Answers
We have to find the value of 'x' in [tex] \sin (x+22)^{\circ}=\cos (2x-7)^{\circ} [/tex]
By using the complementary angle formula which states:
[tex] \cos (90-\Theta )=\sin \Theta [/tex]
Now,
[tex] \cos (90^{\circ}-(x+22)^{\circ})=\cos (2x-7)^{\circ} [/tex]
Therefore, we get
[tex] 90-(x+22)= (2x-7) [/tex]
[tex] 90-x-22= (2x-7) [/tex]
[tex] 68=3x -7 [/tex]
[tex] 75=3x [/tex]
[tex] x=25^{\circ} [/tex]
Answer:
Lets go by a step-by-step process.
Step-by-step explanation:
\cos (90-\Theta )=\sin \Theta
Now,
\cos (90^{\circ}-(x+22)^{\circ})=\cos (2x-7)^{\circ}
Now we have...
90-(x+22)= (2x-7)
90-x-22= (2x-7)
68=3x -7
75=3x
x=25^{\circ}
Related Questions
About 65 out of 300 students prefer walking instead of riding the bus to school. About what percent of the students prefer walking?
Answers
To find the percentage of students who prefer walking, divide the number of students who prefer walking by the total number of students and multiply by 100. In this case, 65 students prefer walking out of a total of 300 students.
Explanation:To find the percentage of students who prefer walking, you divide the number of students who prefer walking by the total number of students and then multiply by 100. In this case, 65 students prefer walking out of a total of 300 students.
So, you divide 65 by 300 and multiply by 100 to get the percentage.
Percentage of students who prefer walking = (65/300) * 100 = 21.67%
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The measure of Angle E, the angle of elevation from point A to point B, is ( 3 x plus 1 ). The measure of Angle D, the angle of depression from point B to point A, is 2 ( x plus 8 ) Find the measure of each angle.
Answers
E----------------> angle of elevation
D----------------> angle of depression
we know that
E=(3x+1)
D=2(x+8)
remember that
angle of elevation is equals to angle of depression------> by alternate angles
then
E=D
(3x+1)=2(x+8)-----------> 3x+1=2x+16----------> 3x-2x=16-1-----> x=15
E=3*15+1-------> 46°
D=2*15+16-----> 46°
the answer is
the measure of angle of elevation and angle of depression is 46°
What are the roots of the polynomial equation?
x2−14x−32=0
Answers
We can easily factor that into:
(x +2) * (x -16) = 0
x1 = -2
x2 = 16
We are given the quadratic equation :
[tex] x^{2} -14x-32=0 [/tex]
Now let us use AC method to factorise it.
Step 1:
Find product of A and C
A=1 and C =-32
A*C =-32
Step 2:
Find factors of -32 such that they add up to give -14.
Factors of -32 that add up to give -14 are -16 and 2.
Step 3:
Rewrite the equation using factors found in step 2.
[tex] x^{2} -16x +2x -32 =0 [/tex]
Step 4:
Factoring by grouping.
[tex] x(x-16) +2(x -16) =0 [/tex]
[tex] (x-16) (x+2) =0 [/tex]
Step 5:
Find roots.
x-16=0 gives x=16
x+2=0 gives x=-2
Answer : Roots of the given Polynomial equation are 16 and -2.
We are given the quadratic equation :
[tex] x^{2} -14x-32=0 [/tex]
Now let us use AC method to factorise it.
Step 1:
Find product of A and C
A=1 and C =-32
A*C =-32
Step 2:
Find factors of -32 such that they add up to give -14.
Factors of -32 that add up to give -14 are -16 and 2.
Step 3:
Rewrite the equation using factors found in step 2.
[tex] x^{2} -16x +2x -32 =0 [/tex]
Step 4:
Factoring by grouping.
[tex] x(x-16) +2(x -16) =0 [/tex]
[tex] (x-16) (x+2) =0 [/tex]
Step 5:
Find roots.
x-16=0 gives x=16
x+2=0 gives x=-2
Answer : Roots of the given Polynomial equation are 16 and -2.
A jar contains 17 orange,7 pink, and 4 black marbles. A marble is drawn at random.What is the probability that the marble is pink or orange
Answers
P(pink) = 7/28
P(orange) = 17/28
P(pink or orange) = P(pink) + P(orange)
P(pink or orange) = 7/28 + 17/28
P(pink or orange) = 24/28
P(pink or orange) = 6/7 or 0.857143 or 85.7%
What must be the value of x so that lines c and d are parallel lines cut by transversal p?
12
18
81
99
Answers
since "y" and 3x+45 are both linear angles, then y + (3x + 45) = 180.
but wait a second!! "y" is a corresponding angle to 81°, so y = 81° then, therefore,
[tex]\bf y+(3x+45)=180\implies 81+(3x+45)=180 \\\\\\ 126+3x=180 \implies 3x=54\implies x=\cfrac{54}{3}\implies x=18[/tex]
and that can only happen, if c || d.
The value of x so that lines c and d are parallel lines cut by transversal p is 18.
What is a Transversal line?Transversal lines are lines that passes intersects the two lines on a plane in two different points.
Given are two parallel lines c and d.
p is the transversal line passing through c and d.
The angle at the exterior side of angle 81° is 180° - 81° = 99°
When two parallel lines are intersected by a transversal line, then the angles formed at the corresponding corners of the transversal with each of the parallel line is called corresponding angles.
(3x + 45)° and 99° are corresponding angles.
Corresponding angles are always equal.
(3x + 45)° = 99°
3x = 99 - 45
3x = 54
x = 54 / 3
x = 18
Hence the value of x is 18.
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You enter 5 tickets into a raffle, in which a total of 65 tickets are entered. the announcer chooses two tickets from the pool of raffle tickets. what is the probability that you win both prizes from the raffle? write your answer as a fraction in simplest form.
Answers
Construction is under way at an airport. This map shows where the construction is taking place. If Road A and Road B are parallel, what is the distance from P to Q on Road C?
Answers
650(2000) = 800x + 800(650)
x = 975 ft
Find the simplified form of the expression. Give your answer in scientific notation.
(9 x 10 5)(6 x 10 -7)
A. 5.4 x 10 -34
B. 1.5 x 10 -1
C. 5.4 x 10 -1
D. 1.5 x 10 -34
Answers
Now we get: [tex](9*10^5)(6*10^{-7})=9*6*10^5*10^{-7}[/tex] by associativity of multiplication.
This is equal to: [tex]54*10^{5+(-7)}=54*10^{-2}[/tex] by the property we stated above, for a=10. Scientific notation requires that the coeeficient in fron tof the power of 10 is between 1-10 and thus since 54=10*5.4, we have that the expression is equal to: 5.4*10*[tex]10^{-2}[/tex]=[tex]5.4*10^{-1}[/tex]. Hence the correct answer is C
A sine function has the following key features:
Period = 12
Amplitude = 4
Midline: y = 1
y-intercept: (0, 1)
The function is not a reflection of its parent function over the x-axis.
How would this graph look??
Answers
Final answer:
A sine function with an amplitude of 4, period of 12, midline of y = 1, and y-intercept of (0, 1) would oscillate between 5 and -3, with a wave repeating every 12 units along the x-axis and starting upward from the y-intercept.
Explanation:
The graph of the sine function with the given properties will have the following characteristics:
The amplitude is 4, which means the function will oscillate 4 units above and below the midline.
The period is 12, indicating that it takes 12 units along the x-axis for the function to repeat its pattern.
The midline is y = 1, so the center of oscillation is not at the x-axis but is shifted upwards by 1 unit.
The y-intercept is (0, 1), which means the function starts at the midline.
Since the function is not a reflection over the x-axis, it means that it starts off going upwards from the midline.
Mapping these points, we can sketch the sine graph starting from the point (0, 1), curving up to a maximum of 5 (midline + amplitude), then down through the midline, reaching a minimum of -3 (midline - amplitude), and back to the midline at (12, 1), completing one full cycle.
helppppppppppppppppppppppp
Answers
10.3 units
Explanation:
Triangle ABC is a right-angled triangle. This means that we can apply special trig functions.
We are given that:
angle B = 25 degrees and AB = 4 units
Therefore:
cos(B) = adjacent / hypotenuse
cos(25) = 4 / BC
BC = 4.414 units
tan(B) = opposite / adjacent
tan(25) = AC / 4
AC = 1.865
Finally, we can get the perimeter as follows:
perimeter = AB + BC + AC
perimeter = 4 + 4.414 + 1.865
perimeter = 10.279 which is approximately 10.3 units
Hope this helps :)
Side c = 4
Angle B = 25°
Step #1: Find angle C by subtracting the other 2 angles from 180°.
C = 180° - A° - B°
C = 180° - 90° - 25°
C = 65°
Step #2: Use the Law of Sines to find side a.
a / sin(A) = c / sin(C)
a / sin(90°) = 4 / sin(65°)
a = (sin(90°) x 4) / sin(65°)
a = 4.414
Step #3: Use the Law of Sines to find side b.
b / sin(B) = c / sin(C)
b / sin(25°) = 4 / sin(65°)
b = (sin(25°) x 4) / sin(65°)
b = 1.865
So you have the sides
c = 4
b = 1.865
a = 4.414
The perimeter is all the sides added up
P = 4 + 1.865 + 4.414
P = 10.279
That can be rounded to 10.3 units
Hope this helps!
Suppose you find a rock and measure that 12.5% of the original uranium-235 still remains it, while the other 87.5% has decayed into lead-207. about how old is the rock?
Answers
713x10^6 years x 3 half-lives = 2139x10^6 years= 2.139 billion years.
How old is the rock?
The answer is: 2.139 billion years
can someone help me with this?
Answers
6+7 = 13 individuals under age 12
7+4 = 11 individuals 13 to 30 years old
13+11 = 24 people total from the two groups
There are 6+7+7+4+4+1 = 29 people total from the entire survey
So the final answer is 24/29. It cannot be reduced further.
PLEASE HELP
8.04b
1. Eliminate the parameter.
x = 5t, y = t + 8
A) y = 5x + 8
B) y = x divided by five + 8
C) y = 5x - 8
D) y = x divided by five - 8
2. Eliminate the parameter.
x = square root of x , y = 3t + 7
A) y = 3x2 + 7
B) y = 3 square root of x + 7, x ≥0
C) y = 3 square root of x - 7, x ≥0
D) y = 3x2 - 7
3. Eliminate the parameter.
x = t2 + 2, y = t2 - 4
A) y = x - 6, x ≥ 1
B) y = x + 6, x ≥ 1
C) y = x2 - 6, x ≥1
D) y = x2 + 6, x ≥1
4. Eliminate the parameter.
x = 4 cos t, y = 4 sin t
Answers
Question 1. Eliminate the parameter. x = 5t, y = t + 8
Answer: option B: y = (x / 5) + 8 ↔ x divided by 5 + 8
Explanation:
1) From x = 5t => t = x / 5
2) Substitute t in y = t + 8 => y = (x / 5) + 8
Which is the option B) y = the division of x by 5, added to 8.
Question 2. Eliminate the parameter.
There is an error in the question, because it says x = √x
If the righ question is x = √t , y = 3t + 7 , then the answer is the option A) y = 3x^2 + 7
Explanation:
1) Given: x = √t , y = 3t + 7
2) from x = √t => t = x^2
3) Substitute t = x^2 in y = 3t + 7
=> y = 3 x^2 + 7 ↔ option A) y = x^2 + 7
Question 3. Eliminate the parameter.
x = t^2 + 2, y = t^2 - 4
Answer: option A) y = x - 6
Explanation:
1) From x = t^2 + 2 => t^2 = x - 2
2) Substitute t^2 in y = t^2 - 4
=> y = x - 2 - 4
=> y = x - 6, since t^2 is ≥ 0, then x ≥ 0
=> option A) y = x - 6, x ≥ 1
Question 4. Eliminate the parameter.
x = 4 cos t, y = 4 sin t
Answer: x^2 + y^2 = 16
Explanation:
1) Square both sides of x = 4 cost
=> x^2 = (4 cos t)^2
x^2 = 16 (cos t)^2
2) Square both sides of y = 4 sin t
y^2 = 16 (sin t)^2
3) Add x^2 and y^2
x^2 + y^2 = 16(cos t)^2 + 16 (sin t)^2
=> x^2 + y^2 = 16 [ (cos t)^2 + (sin t)^2 ]
4) since (cos t)^2 + (sin t)^2 = 1
x^2 + y^2 = 16
please help attachment on please don't skip any parts
will get brainliest
Answers
Using the completing-the-square method, rewrite f(x) = x2 + 10x + 7 in vertex form.
Answers
f(x) - 7 = x² + 10x
Next let's add (half of 10)² to both sides of the equation: btw that is 25 but on the right side we will leave it as 5² because it will make the factoring easier
f(x) - 7 + 25 = x² + 10x + 5²
Lets simplify the left side a bit and factor the perfect square trinomial on the right.
f(x) + 18 = (x + 5)²
Finally move the constant back to the side with the binomial
f(x) = (x + 5)² - 18
The vertex is (-5, -18)
Using the completing-the-square method the vertex form of the function
f(x) = x² + 10x + 7 is f(x) = (x + 5)² - 18
The given function is:
f(x) = x² + 10x + 7
Comparing f(x) = x² + 10x + 7 with f(x) = ax² + bx + c
a = 1, b = 10, c = 7
(b/2)² = (10/2)² = 5²
Add and subtract 5² to the right hand side of the equation
f(x) = x² + 10x + 5² + 7 - 5²
f(x) = x² + 10x + 5² + 7 - 25
f(x) = x² + 10x + 5² - 18
f(x) = (x + 5)² - 18
f(x) = (x + 5)² - 18 is of the form f(x) = a(x - h)² + k which is the vertex form of a quadratic equation
Therefore, the vertex form of the function f(x) = x² + 10x + 7 is
f(x) = (x + 5)² - 18
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Which of these sequence is an arithmetic sequence??
Answers
Answer:
a and c
Step-by-step explanation:
Which statement about this product is true?
0.44 ×(−5 3/4)
It is equal to 0 because 0.44 rounded to the nearest whole number is 0, and 0 times any number is 0.
It is equal to −5 3/4 because 4/4 is equal to 1, and 1 times any number equals that number.
It is greater than −3 because 0.44 × 5 3/4 is less than 1/2 × 6
It is less than −5 3/4 because multiplying by a number less than 1 gives a smaller number.
Answers
Answer:
It is greater than −3 because 0.44 × 5 3/4 is less than 1/2 × 6
Step-by-step explanation:
i guessed it and it was right so ye.
Graph the following inequality and then select the correct graph below.
y ≤ x - 2
Answers
Hope it helps.
Answer:
The graph in the attached figure
Step-by-step explanation:
we have
[tex]y\leq x-2[/tex]
The solution of the inequality is the shaded area below the solid line
The equation of the line is [tex]y= x-2[/tex]
The slope of the line is positive [tex]m=1[/tex]
The y-intercept of the line is the point [tex](0,-2)[/tex]
The x-intercept of the line is the point [tex](2,0)[/tex]
therefore
the graph in the attached figure
Choose the option that correctly completes the statement.
A triangle must have _____ one acute angle.
at most
at least
Answers
Find the constant of variation k for the inverse variation. Then write an equation for the inverse variation. Y=4.5 when x = 3
Answers
Calculate the principal amount which earns $500 simple interest over 3 Years at a rate of 8% p.a round to the nearest cent
Answers
so, to find one year
500 ÷ 3 = $166.67
Interest for one year is $166.67
Interest rate for one year is 8%
8% = 166.67
1% = $20.83
100% = $2083.33
Principal amount is $2083.33
Final answer:
To find the principal amount that would earn $500 in simple interest over 3 years at an 8% annual rate, divide the interest by the product of the rate and period. The principal amount is $2083.33.
Explanation:
Calculating the Principal Amount from Simple Interest
To calculate the principal amount that earns $500 in simple interest over 3 years at a rate of 8% per annum, we can utilize the simple interest formula:
Interest = Principal × rate × time. Plugging in the known values, we get $500 = Principal × 0.08 × 3. This yields the equation $500 = Principal × 0.24.
To find the Principal, we divide $500 by 0.24, which gives us approximately $2083.33. Therefore, the initial principal amount is $2083.33.
The data set represents a bimonthly progression of gasoline prices over the course of several months in an unspecified city. Use a graphing calculator to determine the quadratic regression equation for this data set. x 0 2 4 6 8 y 2.86 2.89 2.93 3.04 3.11 a. c. b. d.
Answers
Answer:
y = 0.0027*x^2 + 0.0111*x + 2.8574
Step-by-step explanation:
Using Excel the procedure is:
First, insert x and y values in a table format, as can be seen in the figure
Then, select data
Next, go to insert tab and inside charts options select scatter plot without any lines
Finally, select a point in the plot, right-click, add trend line, polynomial order 2 and check display equation option
find the arithmetic mean an of an-1 = 3.9 and an+1 = 7.1
a. 11
b. 5.5
c. 3.7
d. 1.6
Answers
Answer:
Step-by-step explanation:
Alright, lets get started.
We are asked to find arithmetic mean of two terms given.
For finding arithmetic mean, we add up the values and divide the sum by the number of values.
Here we have given two numbers , below
[tex]a_{n-1}=3.9[/tex]
[tex]a_{n+1}=7.1[/tex]
So, mean of these two numbers will be = [tex]\frac{3.9+7.1}{2}[/tex]
So, mean of these two numbers will be = [tex]\frac{11}{2}=5.5[/tex]
So, arithmetic mean for given two numbers are 5.5 : Answer (b)
Hope it will help :)
b. 5.5
Step-by-step explanation:FOR LEARNING ONLY.. not necessary to read, but I hope it helps!
you start with:
[tex]a_{n-1}=3.9\\a_{n-1}=7.1[/tex]
arithmetic questions like this are like finding an average.
so you add the values while dividing by the total of values there are.
in this case:
[tex]\frac{7.1+3.9}{2}[/tex]
which is simplified to:
[tex]\frac{11}{2}[/tex]
then decimal:
[tex]5.5[/tex]
.help please and thank you
Answers
What is the initial value of the function represented by this graph? A coordinate grid is shown with x and y axes labeled from 0 to 7 at increments of 1. A straight line joins the ordered pair 0, 2 with the ordered pair 7, 5. 0 1 2 5 Question 7(Multiple Choice Worth 5 points)
Answers
Answer:
The initial value of the graph is 2. Third option is correct.
Step-by-step explanation:
It is given that A coordinate grid is shown with x and y axes labeled from 0 to 7 at increments of 1.
The line is passing through the points (0,2) and (7,5).
The point (0,2) is the y-intercept and graph labeled from 0 to 7, therefore 2 is the initial value.
Slope of line is
[tex]m=\frac{y_2-y_1}{x_2-x_1}=\frac{5-2}{7-0}=\frac{3}{7}[/tex]
The equation of line is
[tex]y=mx+b[/tex]
Where, m is slope and b is y-intercept. So the equation of given line is
[tex]y=\frac{3}{7}x+2[/tex]
At initial condition the value of x is 0. So, put x=0.
[tex]y=\frac{3}{7}(0)+2=2[/tex]
Therefore the initial value of the graph is 2. Option 3 is correct.
Answer:
Option 3 rd is correct
Initial value = 2
Step-by-step explanation:
A equation of line is given by:
[tex]y =mx+b[/tex] ....[1]
where
m is the slope of the line and b is the y-intercept or the initial value
As per the statement:
A coordinate grid is shown with x and y axes labeled from 0 to 7 at increments of 1.
It is also given that:
A straight line joins the ordered pair (0, 2) with the ordered pair (7, 5)
Calculate slope:
using formula:
[tex]\text{Slope (m)} = \frac{y_2-y_1}{x_2-x_1}[/tex]
Substitute the given ordered pairs we have;
[tex]\text{Slope (m)} = \frac{5-2}{7-0}=\frac{3}{7}[/tex]
y-intercept states that the graph which cut y-axis.
Substitute x =0 and solve for x:
we have given with the ordered pair (0, 2)
⇒y-intercept(b) = 2
Substitute the given values of m and b in [1]
[tex]y = \frac{3}{7}x+2[/tex]
The equation of straight line joins the ordered pair (0, 2) with the ordered pair (7, 5) is:
[tex]y = \frac{3}{7}x+2[/tex]
The initial value of the function represented by the given graph as shown below is: 2
Graph this function f(x)=x^2-4x-5
Answers
Answer:
Step 1: a = 1, b = -4
Step 2: x = 2, f(2) = -9
Step 4: (5,0) and (-1,0)
Step 6: f(0) = -5
On the graph the points plotted are (-1,0) , (0,-5) , (2,-9) , and (5,0)
Picture included!
What is the slope of the line shown in the graph?
A.) -1
B.) -2
C.) 1/2
D.) 2
Answers
:D
[tex]\bf \begin{array}{ccccccccc} &&x_1&&y_1&&x_2&&y_2\\ % (a,b) &&(~ 0 &,& 3~) % (c,d) &&(~ 1 &,& 1~) \end{array} \\\\\\ % slope = m slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{1-3}{1-0}\implies \cfrac{-2}{1}\implies -2[/tex]
What is the area of this polygon?
Answers
The polygon has a rectangle and a triangle
Area of triangle FSCW
= Length × width
= 9 × 2
= 18 square units
area of triangle FNS
= 1/2 × base× height
= 1/2 × 9 × 6
= 27 square units
Therefore the area of the polygon is
= 27 + 18
= 45 square units
2x + 3y = 18 3x -4y > 16. Give the Domain and Range, Slope, and Y-intercept for each line. Graph each equation above on the graph below and show all work. Give the Domain and Range, Slope, and Y-intercept for each line. Explain in detail how you got each answer. 2x + 3y = 18 3x -4y > 16 Slope-Intercept Form: Slope-Intercept Form: Domain: Domain: Range: Range: Slope: Slope: Y-intercept: Y-intercept:
Answers
2x + 3y = 18
3x -4y > 16
Part A)
2x + 3y = 18 -------> 3y=[18-2x]---------> y=6-(2/3)x (Slope-Intercept Form)
using a graph tool
see the attached figure
the domain is the interval (-∞,∞)--------> ( all real numbers)
Domain of a function f (x) is the set of all the values of x for which the function is defined
the range is the interval (-∞,∞)--------> ( all real numbers)
Range of the function f(x) is the set of all the values that f(x) takes
Slope-Intercept Form------------> y=6-(2/3)x---------> [y=mx+b]
where
m------> is the slope------------> m=-2/3
Slope=-2/3
Y-intercept is the point for y=0
y=6-(2/3)x-------------> 0=6-(2/3)x--------> x=9
Y-intercept is the point (9,0)
Part B)
3x -4y > 16----------> -4y > 16-3x-----> y < -4+(3/4)x (Slope-Intercept Form)
using a graph tool
see the attached figure
the domain is the interval (-∞,∞)--------> ( all real numbers)
Domain of a function f (x) is the set of all the values for which the function is defined
the range is the interval (-∞,∞)--------> ( all real numbers)
Range of the function f(x) is the set of all the values that f(x) takes
Slope-Intercept Form------------> y = -4+(3/4)x---------> [y=mx+b]
where
m------> is the slope------------> m=3/4
Slope=3/4
Y-intercept is the point for y=0
y = -4+(3/4)x------------->0= -4+(3/4)x-----> 4=(3/4)x----> 16/3 = x----> x=16/3
Y-intercept is the point (5.33,0)
What is the simplest form of (8x2)3?
Answers
[tex] = 8^3 \times (x^2)^3 [/tex]
[tex] = 512x^{2 \times 3} [/tex]
[tex] = 512x^6 [/tex]