Answer:
D
Step-by-step explanation:
Trust me I did t on edge
The vertex form of the given parabola is [tex]f(x) = 3(x + 4)^2 - 6[/tex], option A is correct.
The vertex form of a quadratic function is given by [tex]f(x) = a(x - h)^2 + k[/tex] where (h, k) represents the vertex of the parabola.
We have a = 3, which determines the steepness or "stretching" factor of the parabola.
If a is positive, the parabola opens upwards, and if a is negative, it opens downwards.
The vertex form tells us that the vertex of the parabola is at the point (-4, -6).
The value -4 represents the horizontal shift of the parabola, moving it 4 units to the left, while -6 represents the vertical shift, moving it 6 units downwards.
The vertex form is [tex]f(x) = 3(x + 4)^2 - 6[/tex].
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An airplane travels 3605 km against the wind in five hours and 4605 km with the wind in the same amount of time. What is the rate of the plane in still air and what is the rate of the wind?
recall your d = rt, distance = rate * time.
p = speed of the plane
w = speed of the wind
let's keep in mind that, when the plane is going with the wind, is not really going "p" fast is actually going "p + w" since the wind is adding speed to it, likewise, when the plane is going against the wind, the plane is going "p - w" fast, since the wind is subtracting speed from it.
[tex]\bf \begin{array}{lcccl} &\stackrel{km s}{distance}&\stackrel{kph}{rate}&\stackrel{hours}{time}\\ \cline{2-4}&\\ \textit{against the wind}&3605&p-w&5\\ \textit{with the wind}&4605&p+w&5 \end{array}~\hfill \begin{cases} 3605=(p-w)5\\ \frac{3605}{5}=p-w\\ 721=p-w\\ 721+w=\boxed{p}\\ \cline{1-1} 4605=(p+w)5 \end{cases} \\\\\\ 4605=(p+w)5\implies \cfrac{4605}{5}=p+w\implies \stackrel{\textit{substituting in the 2nd equation}}{921=\left( \boxed{721+w} \right)+w}[/tex]
[tex]\bf 921=721+2w\implies 200=2w\implies \cfrac{200}{2}=w\implies \blacktriangleright 100=w \blacktriangleleft \\\\\\ \stackrel{\textit{since we know that}}{p=721+w\implies }p=721+100\implies \blacktriangleright p=821 \blacktriangleleft[/tex]
When a figure is rotated, its angle measures( remain the same or may change), and its orientation (remains the same or may change).
Answer:
remain the same, may change
Step-by-step explanation:
When a figure is rotated, its angle measured remains the same and its orientation remains the same.
What is rotation?The circular movement of an object around a rotation axis is known as rotation. An infinite number of rotation axes can exist in a three-dimensional object.
Therefore When a figure is rotated, its angle measured remains the same and its orientation remains the same.
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Which translation maps the graph of the function fx=x2 onto the function gx= x2+(-8x)+7
Answer:
Shift the graph of f(x) 4 units to the rightand 7 units upStep-by-step explanation:
f(x) + n - shift a graph of f(x) n units up
f(x) - n - shift a graph of f(x) n units down
f(x + n) - shift a graph of f(x) n units to the left
f(x - n) - shift a graph of f(x) n units to the right
=============================================
We have
[tex]f(x)=x^2,\ g(x)=x^2+(-8x)+7[/tex]
Convert the equation of g(x) to the vertex formula:
[tex]y=a(x-h)^2+k[/tex]
[tex]g(x)=x^2+(-8x)+7\\\\g(x0=x^2-2(x)(4)+7\\\\g(x)=\underbrace{x^2-2(x)(4)+4^2}-4^2+7\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\g(x)=(x-4)^2+7=f(x-4)+7\\\\\text{shift the graph of f(x) 4 units to the right and 7 units up}[/tex]
30 POINTS!!
Test the residuals of two other points to determine how well the line of best fit models the data.
Answer:
the line of best feet passes through three poin
Step-by-step explanation:
1st three points are green, yellow and red
2nd three point are green yellow and upward green
Final answer:
The outlier with a large residual indicates it does not fit the line of best fit, and removing it can improve the model's accuracy. After recalculating without the outlier, a stronger correlation coefficient of 0.9121 suggests that the line of best fit models the data better.
Explanation:
Understanding Residuals and Outliers in Linear Regression
In the context of linear regression, a residual is the difference between the observed value of the dependent variable (y) and the predicted value (ý) provided by the regression model. We are testing the residuals to determine how closely the regression line models the actual data points. If a residual is larger than twice the standard deviation (in this case, greater than 32.8 or less than -32.8), the corresponding data point is considered an outlier. The single large outlier identified with a grade of 65 on the third exam and 175 on the final exam has a substantial residual of 35, indicating that this data point does not fit well with the line of best fit. This outlier can significantly affect the regression line's slope and y-intercept.
Outliers can have a significant impact on the best-fit line, potentially skewing the results and affecting predictions. To assess the outlier's influence, we can remove it and re-calculate the best-fit line and correlation coefficient. If the coefficient is closer to 1 or -1 and the sum of squared errors (SSE) is lower after re-calculating, this indicates a better fit. In this case, the line of best fit without the outlier provides a correlation coefficient of 0.9121, suggesting a stronger linear relationship between the third exam and final exam scores after removing the outlier.
Help with word problems!
Need help with 6 & 7. Thanks!
Answer:
Part 6) Option B $3.20
Part 7) Option C. 8,295 students
Step-by-step explanation:
Part 6)
Let
x -----> the cost of one hamburger
y ----> the cost of one soda
we know that
7x+3y=27.95 ------> equation A
5x+4y=23.40 ----> equation B
Solve the system by graphing
Remember that the solution by graphing is the intersection point both graphs
using a graphing tool
The solution is the point (3.2,1.85)
see the attached figure N 1
therefore
The cost of one hamburger is $3.20
Part 7)
Let
x -----> the number of students
y -----> the number of teachers
we know that
x=35y ------> equation A
x+y=8,544-12
x+y=8,532 -----> equation B
Solve the system by substitution
substitute equation A in equation B and solve for y
35y+y=8,532
36y=8,532
y=237 teachers
Find the value of x
x=35y ------> x=35(237)=8,295
therefore
The number of students is 8,295
Is x^2 = 144 rational or irrational
Answer:
The roots are rational
Step-by-step explanation:
Given
x² = 144 ( take the square root of both sides )
x = ± [tex]\sqrt{144}[/tex] = ± 12 ← both rational
A rational number can be expressed in the form
[tex]\frac{a}{b}[/tex] where a and b are integers.
12 = [tex]\frac{12}{1}[/tex] ← thus rational
- 12 = [tex]\frac{-12}{1}[/tex] ← thus rational
Answer:
The answer is that x^2=144 is rational
The Big Burger recipe calls for 3 meat patties, 2 slices of cheese, and four pickles. How many meat patties are needed if 52 pickles are used?
39
52 divided by 4 is 13. 52 pickles divided into 4 pickles for each meal is 13. 39 patties divided by 3 patties is 13 aswell so. the answer: 39
The number of meat patties that are needed if 52 pickles are used is:
39 meat patties.
Step-by-step explanation:It is given that:
The Big Burger recipe calls for 3 meat patties, 2 slices of cheese, and four pickles.
This means that for every 4 pickles there are 3 meat patties.
This means that for every 1 pickles there are: 3/4 meat patties.
Hence, for every 52 pickles there are: 3/4×52 meat patties
= 39 meat patties.
If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system?
Answer:
No solution.
Step-by-step explanation:
If the linear equations in a system are parallel, that means there is no solution.
Aimee noticed her plant grew 2/3 of an inch every week since it sprouted. She created this graph to show its growth.Which statement about Aimee’s graph is true?
Answer:
The correct answer is A. Aimee's graph is correct because the ratio [tex]\frac{2}{3} :1[/tex] is equal to 2:3, which her graph shows in each point.
Step-by-step explanation:
We are given that Aimee noticed her plant grew 2/3 of an inch every week since it sprouted and a graph is drawn to show the plant growth.
We are to determine whether which of the given statements is correct.
The ratio [tex]\frac{2}{3} :1[/tex] is basically equal to 2:3. Therefore, the graph is correct as it shows the same ratio at each point.
For the points (6, 4) and (3, 2) = [tex]\frac{4-2}{6-3} =\frac{2}{3}[/tex]
Answer:it’s A great got it right on edge
Step-by-step explanation:
A plumber charges $47.50 per hour plus a
$65.00 service charge. Your father's firm
hires him to fix some leaky pipes.
Find the total charges if it takes the plumber 8hours to complete the task.
Answer:
445 dollars
Step-by-step explanation:
You are given he charges 47.5 per hour so 47.5x is how much you will pay for x hours and he charges a 65 dollar service fee.
So together he is charge you 47.5x+65 for x hours.
If it spends 8 hours, the cost will be 47.5(8)+65=445.
The total charges if it takes the plumber 8hours to complete the task is $445.00
How to find the total charges if it takes the plumber 8hours to complete the task ?According to the question,
A plumber charges $47.50 per hour.There is a $65.00 service charge.The plumber takes 8 hours to complete the task.For 1 hour the charge is $47.50
∴ For 8 hours, the charge is $(47.50 x 8) = $ 380
The service charge is to be added now.
∴ The final amount of money = $(380.00 + 65.00) = $445.00
The total charge is $ 445.00
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A secretary works a 35 hour week for which she is paid $262.50. She works 6 hours over- time on Saturday which is paid for at time and a half , and 4 hours overtime on Sunday which is paid for at double time. Calculate her gross wage for the week.
Answer:
$390.
Step-by-step explanation:
first you need to find out hour much the secretary gets paid an hour. So you will divide $262.50 by 35 hours
262.50 / 35 = 7.50
so we know that she worked over time of 6 hours and that will be time and half
to figure out how much for time and a half. We are going to divide her hourly rate by 2.
7.50 / 2 = 3.75
then to find out how much she made for that 6 hours we will add
7.50 + 3.75 = 11.25
to get the amount for over time on Saturday we will multiply
11.25 x 6 = 67.50
Now for the double time we will double her pay so will add
7.50 + 7.50 = 15
so then we are going to multiply to get your pay for the 4 hours overtime
15(4) = $60
Now to find the total amount we are going to add all of our totals together.
262.50 + 67.50 + 60 = 390.
Her total gross wage for the week is $390.
Answer:
$390.
Step-by-step explanation:first you need to find out hour much the secretary gets paid an hour. So you will divide $262.50 by 35 hours
262.50 / 35 = 7.50
so we know that she worked over time of 6 hours and that will be time and half
to figure out how much for time and a half. We are going to divide her hourly rate by 2.
7.50 / 2 = 3.75
then to find out how much she made for that 6 hours we will add
7.50 + 3.75 = 11.25
to get the amount for over time on Saturday we will multiply
11.25 x 6 = 67.50
Now for the double time we will double her pay so will add
7.50 + 7.50 = 15
so then we are going to multiply to get your pay for the 4 hours overtime
15(4) = $60
Now to find the total amount we are going to add all of our totals together.
262.50 + 67.50 + 60 = 390.
Her total gross wage for the week is $390
How do I find the answer?
Step-by-step explanation:
Hi there!
The best way to approach this problem is Soh Cah Toa.
In this case you can use sine. sine is opposite over hypotenuse.
so sin(17)= b/15
then to solve for b you multiply 15 on both sides to get 4.4
Answer:
Step-by-step explanation:
This question is an application of the sine law
Equation
b/sin(B) = c / Sin(C)
Givens
b = ????
B = 17
c = 15
C = 140
Solution
Keep in mind that this may not work.
b/sin(17) = 15 / sin(140) Multiply both sides by sin(17)
b = 15*sin(17)/sin(140)
sin(17) = 0.2924Sin(140) = 0.6428b = 15*0.2924/0.6428
b = 6.8233
If x+3/3=y+2/3, then x/3=
A) y/3
B)y-1
C)y/2
D)y+1
Answer:
y/2
Step-by-step explanation:
x+3=y+2
------ --------
3 2
Using cross products
2(x+3) = 3(y+2)
Distribute
2x+6 = 3y+6
Subtract 6 from each side
2x+6-6 = 3y+6-6
2x= 3y
Divide each side by 2
2x/2 = 3y/2
x = 3/2 y
We want to find x/3
Divide each side by 3
x/3 = 3/2 y * 1/3
x/3 = 1/2 y
Line segment CD has a length of 3 units. It is translated 2 units to the right on a coordinate plane to obtain line segment C’D. What is the length of C’D.
Answer:
C'D'=3 units
Step-by-step explanation:
we know that
The translation of a segment does not modify its length
so
The length of the segment CD and the length of the segment C'D' are equal
therefore
C'D'=3 units
Verify
Let
The coordinate of point C equal to x1 and the coordinate of point D equal to x2
so
The length of segment CD is equal to
CD=x2-x1=3
The rule of the translation is
x ------> x+2
The new coordinates will be
C'=x1+2
D'=x2+2
The length of segment C'D' is equal to
(x2+2)-(x1+2)=(x2-x1)=3 units
Answer:
D 3
Step-by-step explanation:
The sales of a certain product after an initial release can be found by the equation
S = 16V 3t +25, where s represents the total sales (in thousands) and t represents
the time in weeks after release.
Make a table of values, graph the function and use the graph to estimate the sales
7 weeks after release.
A about $98
B about $98,000
C about $1,225,000
D about $20,000
Answer:
B about $98,000
Step-by-step explanation:
The equation that models the sales of the product after an initial release is:
[tex]S = 16 \sqrt{3t} + 25[/tex]
where s represents the total sales (in thousands) and t represents
the time in weeks after release.
The table and graph is shown in the attachment.
From the graph we estimate the sales
7 weeks after release to be about 98 thousands dollars.
The correct choice is B.
A music Web site announced that over
4 X 10^9 songs were downloaded by 5 X 10^7
registered users. What is the average number
of downloads per user?
Step-by-step explanation:
Average=total numbers of songs /registered users
Average= 4*10^9/5*10^7
Average=40*10^8/5*10^7
Average=8*10^(8-7)
Average=8*10^(1)
Average=80 songs downloaded per user
The Average number is 80 songs downloads per user.
What is Average?The ratio of the sum of the values in a particular set to all the values in the set is the mean value, which is the definition of the average.
The middle number, which is obtained by dividing the sum of all the numbers by the variety of numbers, is the average value in a set of numbers.
Given:
Total Registered user = 5 x [tex]10^7[/tex]
Downloaded songs = 4 x [tex]10^9[/tex]
So, Average=total numbers of songs /registered users
Average = 4 x [tex]10^9[/tex]/ 5 x [tex]10^7[/tex]
Average= 40 x [tex]10^8[/tex]/ 5 x [tex]10^7[/tex]
Average = 8 x [tex]10^{(8-7)[/tex]
Average= 8 x 10
Average= 80 songs.
Hence, 80 songs downloaded per user.
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Solve the system of equations given by 5x - 2y = -6 and 15x - 6y = 6
A. Infinitely many solutions
B. (1, 1)
C. No solution
D. ( -2, -2)
To solve the system of equations, we can use the method of substitution. However, when we substitute the expression for x in the second equation, we get an equation that is not true, indicating that the system has no solution.
Explanation:To solve the system of equations given by 5x - 2y = -6 and 15x - 6y = 6, we can use the method of substitution. First, we can solve one of the equations for either variable, then substitute that expression into the other equation to solve for the other variable. Let's solve the first equation for x:
5x - 2y = -6
5x = 2y - 6
x = (2y - 6)/5
Now, substitute this expression for x in the second equation:
15((2y - 6)/5) - 6y = 6
6y - 18 - 6y = 6
-18 = 6
This leads to the equation -18 = 6, which is not true. Therefore, the system of equations has no solution. So, the correct answer is C. No solution.
A number consist of 2 digits whose sum is 8, If 8 is subtracted from the number, the digits interchange their place. The number is
Step-by-step explanation:
Let's say the two digit number is 10x + y, where x is the first digit and y is the second digit.
The sum of the digits is 8:
x + y = 8
If 8 is subtracted from the number, the digits switch place.
10x + y − 8 = 10y + x
Simplify the second equation:
9x − 8 = 9y
Substitute from the first equation.
y = 8 − x
9x − 8 = 9 (8 − x)
9x − 8 = 72 − 9x
18x = 80
x = 4.444
There's a problem. x isn't an integer. Are you sure you copied the problem correctly? Perhaps you meant if 18 is subtracted from the number, the digits switch place.
9x − 18 = 9 (8 − x)
9x − 18 = 72 − 9x
18x = 90
x = 5
y = 8 − x
y = 3
So the number is 53.
[tex]x+y=8\\10x+y-8=10y+x\\\\x+y=8|\cdot9\\9x-9y=8\\\\9x+9y=72\\\underline{9x-9y=8}\\18x=80\\x=\dfrac{80}{18}=\dfrac{40}{9}[/tex]
x is not integer, so there must be a mistake in the problem.
Find the volume of the oblique rectangular prism with length 8cm, width 7cm, and height 9cm.
Final answer:
The volume of the oblique rectangular prism is calculated using the length, width, and height. The formula V = l times w times h gives a volume of 504 cubic centimeters.
Explanation:
To find the volume of an oblique rectangular prism, we use the same formula as for a right rectangular prism because the volume is not affected by the obliquity of the sides. The formula for the volume (V) is the product of the length (l), width (w), and height (h). So, using the provided dimensions:
V =l times w times h = 8 cm times 7 cm times 9 c
Now, let's calculate:
V = 8 times 7 times 9 = 504 cm
Therefore, the volume of the oblique rectangular prism is 504 cubic centimeters.
Solve 2/3 x > 8 or 2/3 x <4
Answer:
Option 1: {x | x > 12 or x < 6}
Step-by-step explanation:
Given inequalities will be solved one by one:
[tex]\frac{2}{3}x >8\\2x > 8*3\\2x>24\\x > \frac{24}{12} \\x>12[/tex]
Or
[tex]\frac{2}{3}x<4\\2x<4*3\\2x<12\\x < \frac{12}{2}\\ x<6[/tex]
Hence we can see that the solution of both inequalities combined is:
x>12 or x<6
Hence, option 1 is correct ..
what is the value of the discriminant of the quadratic equation -2x^2 -8x+8 and what does it value mean about the number about the number
Final answer:
The value of the discriminant of the quadratic equation -2x² - 8x + 8 is 128. The positive discriminant suggests that the equation has two distinct real roots.
Explanation:
The discriminant of a quadratic equation can be calculated using the formula D = b² - 4ac, where a, b, and c are the coefficients of the quadratic equation in the form ax² + bx + c = 0.
In the given quadratic equation -2x² - 8x + 8, a = -2, b = -8, and c = 8. Substituting these values into the discriminant formula:
D = (-8)² - 4(-2)(8) = 64 - (-64) = 128.
The value of the discriminant is 128. The discriminant value can provide information about the nature of the roots of the quadratic equation. If the discriminant is positive (greater than 0), then the equation has two distinct real roots. If the discriminant is 0, then the equation has one real root (a repeated root). If the discriminant is negative, then the equation has no real roots.
What statements describe the properties of a plane? Select three options.
1)A plane is one dimensional.
2)A plane has length and width.
3)A plane extends infinitely in all directions.
4)A plane is precisely defined.
5)A plane is a flat surface.
Answer:
2)A plane has length and width.
3)A plane extends infinitely in all directions
5)A plane is a flat surface.
Step-by-step explanation:
We can think of a plane as a line in space with no height, only length and width.
Yes, a plane is a two-dimensional surface, hence it has length and width.
2)A plane has length and width (TRUE)
The plane surface extends infinitely far, therefore it extends infinitely in all direction.
3)A plane extends infinitely in all directions (TRUE)
5)A plane is a flat surface(TRUE)
The correct options are 2,3 and 5.
See attachment
Answer:
B,C,E
Step-by-step explanation:
A polygon has coordinates A(-7, 8), B(-4, 6), C(-4, 3), D(-8, 3), and E(-9, 6). What are the coordinates of its image, polygon A′B′C′D′E′, after a 270° counterclockwise rotation about the origin and a translation 2 units to the left and 3 units up?
Answer:
A' = (6 , 10) , B' = (4 , 7) , C' = (1 , 7) , D' = (1 , 11) , E' = (2 , 12)
Step-by-step explanation:
* Lets revise the rotation and translation
- If point (x , y) rotated about the origin by angle 90° counterclockwise
∴ Its image is (-y , x)
- If point (x , y) rotated about the origin by angle 180° counterclockwise
∴ Its image is (-x , -y)
- If point (x , y) rotated about the origin by angle 270° counterclockwise
∴ Its image is (y , -x)
- If the point (x , y) translated horizontally to the right by h units
∴ Its image is (x + h , y)
- If the point (x , y) translated horizontally to the left by h units
∴ Its image is (x - h , y)
- If the point (x , y) translated vertically up by k units
∴ Its image is (x , y + k)
- If the point (x , y) translated vertically down by k units
∴ Its image is (x , y - k)
* Now lets solve the problem
- The vertices of the polygon are:
A = (-7 , 8) , (B = (-4 , 6) , C = (-4 , 3) , D = (-8 , 3) , E = (-9 , 6)
- The polygon rotates 270° counterclockwise about the origin
∵ Point (x , y) rotated about the origin by angle 270° counterclockwise
∴ Its image is (y , -x)
∵ A = (-7 , 8)
∴ Its image = (8 , 7)
∵ B = (-4 , 6)
∴ Its image = (6 , 4)
∵ C = (-4 , 3)
∴ Its image = (3 , 4)
∵ D = (-8 , 3)
∴ Its image = (3 , 8)
∵ E = (-9 , 6)
∴ Its image = (6 , 9)
- After the rotation the image will translate 2 units to the left and
3 units up
∴ We will subtract 2 units from each x-coordinates of the vertices and
add 3 units to each y-coordinates of the vertices
∵ Point (x , y) translated horizontally to the left by h units
∴ Its image is (x - h , y)
∵ Point (x , y) translated vertically up by k units
∴ Its image is (x , y + k)
∴ A' = (8 - 2 , 7 + 3)
∴ A' = (6 , 10)
∴ B' = (6 - 2 , 4 + 3)
∴ B' = (4 , 7)
∴ C' = (3 - 2 , 4 + 3)
∴ C' = (1 , 7)
∴ D' = (3 - 2 , 8 + 3)
∴ D' = (1 , 11)
∴ E' = (6 - 2 , 9 + 3)
∴ E' = (4 , 12)
* The coordinates of its image are:
A' = (6 , 10) , B' = (4 , 7) , C' = (1 , 7) , D' = (1 , 11) , E' = (2 , 12)
After a 270° counterclockwise rotation and 2 units left and 3 units up translations, the polygon's image has the new coordinates A''(-10,-4), B''(-8,-1), C''(-5,-1), D''(-5,-5), and E''(-8, -6).
Explanation:In trigonometry and geometry, a 270° counterclockwise rotation of a point (x, y) about the origin gives a new point (-y, x). Now, let us consider the transformation of point A(-7, 8). After a 270° rotation, the new point is A'(-8, -7) and after translating 2 units left and 3 units up, the final transformed point A'' is (-8-2, -7+3) = (-10, -4).
Following the same process, B'(-6, -4), C'(-3, -4), D'(-3, -8), E'(-6, -9) and, after translation, B''(-8, -1), C''(-5, -1), D''(-5, -5), E''(-8, -6). Thus, the coordinates of the polygon A'B'C'D'E' after a 270° counterclockwise rotation and a 2 unit left and 3 units up translations are A''(-10,-4), B''(-8,-1), C''(-5,-1), D''(-5,-5), and E''(-8, -6).
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If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its center point is (5, 7) (-5, 7) (5, -7)
Answer:
center ( -5 , 7).
Step-by-step explanation:
Given : If the equation of a circle is (x + 5)² + (y - 7)² = 36.
To find : Find its center .
Solution : We have given (x + 5)² + (y - 7)² = 36.
Standard equation of circle : (x – h)² + (y – k)² = r².
Where, (h ,k) = center , r = radius .
On comparing (x + 5)² + (y - 7)² = 36.
h = -5 , k = 7
So, the center ( -5 , 7).
Therefore, center ( -5 , 7).
f(x) = 8x^2 - 2x + 3
g(x) = 12x^2 + 4x-3
What is h(x) = f(x) – g(x)?
h(x) = 20x^2 + 2x
h(x) = -4x^2 - 6x
h(x) = -4x^2 - 6x + 6
h(x) = -4x^2 + 2x
Answer:
-4x^2-6x+6
(third choice)
Step-by-step explanation:
To do f(x)-g(x) we must insert the expression for f(x) and g(x) into this:
This will give us:
(8x^2-2x+3)
-(12x^2+4x-3)
--------------------
-4x^2-6x+6
Horizontally if you prefer:
(8x^2-2x+3)-(12x^2+4x-3)
Distribute and get rid of paranthesis:
8x^2-2x+3-12x^2-4x+3
Pair up like terms:
8x^2-12x^2-2x-4x+3+3
Combine the like terms:
-4x^2-6x+6
Answer:
h(x) = -4x^2 - 6x + 6
Step-by-step explanation:
f(x) - g(x)
= 8x^2 - 2x + 3 - (12x^2 + 4x - 3) (Note the parentheses around g(x))
Distributing the negative over the parentheses:
= 8x^2 - 2x + 3 - 12x^2 - 4x + 3
= -4x^2 - 6x + 6 = h(x).
help me to do this question friends
Answer:
10 square unitsStep-by-step explanation:
It's a right triangle.
The formula of an area of a right triangle:
[tex]A=\dfrac{ab}{2}[/tex]
a, b - legs
Find x-intercept and y-intercept of a line 4x + 5y = 20.
x-intercept (y = 0):
4x + 5(0) = 20
4x + 0 = 20
4x = 20 divide both sides by 4
x = 5
y-intercept (x = 0):
4(0) + 5y = 20
0 + 5y = 20
5y = 20 divide both sides by 5
y = 4
Therefore the legs are a = 5, b = 4.
Substitute:
[tex]A=\dfrac{(5)(4)}{2}=\dfrac{20}{2}=10[/tex]
Look at the picture.
A model of a rectangular patio at a landscaping business will be enlarged by a scale factor of 2 when it is installed in a customer’s back yard. The area of the new enlarged patio will be 160 square feet. Which is the area of the landscaper’s model?
Answer: [tex]80\ ft^2[/tex]
Step-by-step explanation:
You know that the model of a rectangular patio at a landscaping business will be enlarged by a scale factor of 2 and the new area will be 160 square feet.
Since you know that the area of the new enlarged patio will be 160 square feet, you need to divide the area of the new enlarged patio in order to find the area of the landscaper’s model.
This is:
[tex]Area_(model)=\frac{160\ ft^2}{2}\\\\Area_(model)=80\ ft^2[/tex]
Answer:
I think its 40
Step-by-step explanation:
i come back and see:)
I got it right. good luck
QRST is a rectangle. If RT = 4x – 16 and SQ = x + 5, find the value of x.
To find the value of x, we set the expressions for the sides of the rectangle equal to each other (4x - 16 = x + 5) and solve for x to get x = 7.
The student has asked to find the value of x given that QRST is a rectangle with sides RT and SQ. Since in a rectangle opposite sides are equal, we can set the expressions for RT and SQ equal to each other:
RT = SQ
4x – 16 = x + 5
To solve for x, we must do some algebra. Subtract x from both sides of the equation:
4x – x – 16 = 5
Combine like terms:
3x – 16 = 5
Add 16 to both sides:
3x = 21
Divide by 3:
x = 7
Therefore, the value of x is 7.
if angle a is 60° and angle c is 30°what is the measurement of angle b ?
Answer:
m∠B = 90°
Step-by-step explanation:
Note that the figure given to you is a triangle, which has 3 angles, and the total measurement of 3 angles is = 180°.
Let m∠B = x
m∠A = 60°
m∠C = 30°
Set the equation:
m∠A + m∠B + m∠C = 180°
Plug in the corresponding numbers to the corresponding variables:
60 + x + 30 = 180
Isolate the variable, x. Combine like terms:
x + (60 + 30) = 180
x + (90) = 180
Isolate the variable, x. Subtract 90 from both sides:
x + 90 (-90) = 180 (-90)
x = 180 - 90
x = 90
m∠B = 90°
HELP PLEASE???!!!!!!!
What is the solution to the system of equations below?
y=3/4x-12 and y=-4x-31
A. (–4, –15)
B. (–4, –12)
C. (4, –9)
D. (4, –47)
Answer:
A. (-4, -15)Step-by-step explanation:
[tex]\left\{\begin{array}{ccc}y=\dfrac{3}{4}x-12&(1)\\y=-4x-31&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\\dfrac{3}{4}x-12=-4x-31\qquad\text{multiply both sides by 4}\\\\3x-48=-16x-124\qquad\text{add 48 to both sides}\\\\3x=-16x-76\qquad\text{add}\ 16x\ \text{to both sides}\\\\19x=-76\qquad\text{divide both sides by 19}\\\\x=-4\\\\\text{Put it to (2):}\\\\y=-4(-4)-31\\y=16-31\\y=-15[/tex]