Answer:
Step-by-step explanation:
hello :
(4x+3)(2x-5)=0
4x+3=0 or 2x-5=0
x= -3/4 or x=5/2
(4x+3)(2x-5) = 8x²-14x-15
Step-by-step explanation:
Given,
(4x+3)(2x-5)
To find the value of the given multiplication.
Formula
(a+b)(c+d)
= a(c+d)+b(c+d) = ac+ad+bc+bd
Now,
(4x+3)(2x-5)
= 4x(2x-5)+3(2x-5)
= 8x²-20x+6x-15
= 8x²-14x-15
(x-20) (2x+10) (x+40) find the value of x
Answer:
2 • (x - 20) • (x + 5) • (x + 40)
Step-by-step explanation:
Final answer:
To solve the equation (x-20) (2x+10) (x+40)=0, we set each factor equal to zero and solve for x, resulting in three solutions: x = 20, x = -5, and x = -40.
Explanation:
To find the value of x in the equation (x-20) (2x+10) (x+40) = 0, we need to use the property that if a product of factors equals zero, at least one of the factors must be zero. This gives us three separate equations to solve: x - 20 = 0, 2x + 10 = 0, and x + 40 = 0.
Step-by-Step Solution:
Solve x - 20 = 0: Add 20 to both sides, which gives x = 20.
Solve 2x + 10 = 0: Subtract 10 from both sides and then divide by 2, giving x = -5.
Solve x + 40 = 0: Subtract 40 from both sides, which gives x = -40.
Therefore, the solutions to the equation are x = 20, x = -5, and x = -40.
At a car dealership, the sales records of weekdays and weekends were examined. Ten of the days examined were weekdays and 10 of them were weekend days. The following statistical information was calculated from the number of sales made during weekdays and weekends.
Weekday
Sales Weekend
Sales
Mean 15 18
Median 13 19
Mode 14 21
Range 10 13
Based on these samples, what generalization can be made?
A.
Not enough information is provided to draw any of these conclusions.
B.
More cars were sold on the weekdays than on the weekends.
C.
The same number of cars were sold on the weekends as on the weekdays.
D.
Less cars were sold on the weekdays than on the weekends.
Answer:
I believe D is the answer
Step-by-step explanation:
Hometown Buffet has tables that can seat 6 people and booths that can seat 4 people. The restaurant has 38 seating units for seating a total of 188 people. How many tables and booths are at the restaurant?
Solution:
Let "x" be the number of tables
Let "y" be the number of booths
The restaurant has 38 seating units
Therefore,
x + y = 38
x = 38 - y ------- eqn 1
Hometown Buffet has tables that can seat 6 people and booths that can seat 4 people
Total of 188 people
Therefore,
6x + 4y = 188 ------ eqn 2
Substitute eqn 1 in eqn 2
6(38 - y) + 4y = 188
228 - 6y + 4y = 188
2y = 40
y = 20
Substitute y = 20 in eqn 1
x = 38 - 20
x = 18
Thus there are 18 tables and 20 booths are at the restaurant
Andre says, “I multiplied 4 by 5, then cubed the result.” Select all expressions that equal Andre’s answer.
The expressions which have the final answer 8000 will be equal to Andre's answer.
What is Multiplication?Multiplication is the process of adding a number repeatedly up to the times as that of the another number which is being multiplied with the given number.
For example 2 × 3 means 2 is added to itself 3 times or 3 is added to itself 2 times.
Andre says, “I multiplied 4 by 5, then cubed the result.”
Mathematically the expression is (4 × 5)³.
(4 × 5)³ = (4 + 4 + 4 + 4 + 4)³
= 20³
Now a number cubed means it is multiplied to itself 3 times.
20³ = 20 × 20 × 20
= 8000
Hence the resultant of the expression (4 × 5)³ = 8000. So all expressions which will result in an answer of 8000 will be equal to Andre's answer.
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which expression represents 7 times the difference between 300 and 28
Answer:
(300-28)7
Step-by-step explanation:
You always do parenthesis first and then the 7 means to do multiplication if it is right next to the parenthesis
Answer:
7(300-28)
Step-by-step explanation: All you have to do is put the 300-28 in parentheses (300-28) and then you would put the 7 on the outside of the parentheses and your answer would be 7(300-28)
Plot the point ( 2, - /4
Answer:
A.
Step-by-step explanation:
The first number is 2, so 2 must be plotted on the X radius (because it goes by X first). B plots X on the Y axis so therefore, by process of elimination, A is the answer.
Haley’s work evaluating (Negative 2) Superscript 8 is shown below.
(Negative 2) Superscript 8 = (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) = negative 256
Which statement best describe Haley’s first error?
Answer:
D
Step-by-step explanation:
The statements are shown below:
A) She used the wrong number as a repeated factor and should have evaluated -2x2x2x2x2x2x2x2.
B) She used the wrong number as a repeated factor and should have evaluated -(8x8).
C) She misinterpreted the exponential form and should have multiplied -2 and 8.
D) She made a sign error when multiplying and should have had 256 as a final answer.
Solution:
The problem to simplify is:
[tex](-2)^{8}[/tex]
Haley's steps are shown below:
[tex](-2)^{8}=(-2)(-2)(-2)(-2)(-2)(-2)(-2)(-2)=-256[/tex]
Generally,
[tex](a)^b[/tex] is actually "a" multiplied "b" times.
So, Haley wrote "-2" eight times multiplied together. That is okay.
Now,
We are dealing with negative numbers.
When negative numbers are multiplied "odd" number of times, the answer is negative.When negative numbers are multiplied "even" number of times, the answer is positive.Haley wrote "-2" eight times, which is EVEN number of times, so the answer would be POSITIVE. But, Haley's answer is negative. Which is wrong. But "256" is right.
Haley's error is:
Answer choice D
Answer:
the answer is D
Step-by-step explanation:
Factor the expression:
16x^2 - 16xy^3 + 4y^6
Answer:
(4x - 2y³)²
Step-by-step explanation:
a² - 2ab + b² = (a - b)²
16x² = 4²x² = (4x)² , Therefore, a = 4x
4y⁶=2²(y³)² = (2y³)² = b² , Therefore, b = 2y³
2ab = 2*4x*2y³ = 16xy³
16x² - 16xy³ + 4y⁶ = (4x)² - 2* 4x * 2y³ + (2y³)²
= (4x - 2y³)²
Answer:(4x - 2y³)²
Step-by-step explanation:
Find the time required for an investment of 5000 dollars to grow to 6000 dollars at an interest rate of 7.5 percent per year, compounded quarterly.
Your answer is t=
To find the time required for an investment to grow to a certain amount with compound interest, we can use the formula Final Balance = Principal(1 + interest rate/number of compounding periods)^(number of compounding periods * time). In this case, the investment of $5000 will take approximately 4.08 years to grow to $6000 at an interest rate of 7.5% per year, compounded quarterly.
Explanation:To find the time required for an investment to grow to a certain amount with compound interest, we can use the formula:
Final Balance = Principal(1 + interest rate/number of compounding periods)^(number of compounding periods * time)
In this case, the initial principal is $5000, the final balance is $6000, the interest rate is 7.5% (or 0.075), and the interest is compounded quarterly (so there are 4 compounding periods per year).
Convert the interest rate to a decimal: 0.075Substitute the known values into the formula: 6000 = 5000(1 + 0.075/4)^(4*time)Divide both sides by 5000: 1.2 = (1 + 0.075/4)^(4*time)Take the natural logarithm of both sides: ln(1.2) = ln((1 + 0.075/4)^(4*time))Divide both sides by ln((1 + 0.075/4)^(4*time)): time = ln(1.2)/ln((1 + 0.075/4)^(4*time))Using a calculator, we can solve for time to find that the investment will take approximately 4.08 years to grow from $5000 to $6000.
Solve the quadratic equation for x.
(x−4)(x+6)=0
Answer:
X = 4, -6
Step-by-step explanation:
Solve for x by simplifying both sides of the equation, then isolating the variable.
Answer:
x = 4 and x = -6
Step-by-step explanation:
We can use the Zero Identity Property, which states that 0 * n = 0, where n is any number.
Here, in order for (x - 4)(x + 6) = 0 to be true, either x - 4 must equal 0 or x + 6 must equal 0. So set each of them equal to 0 and solve for x:
x - 4 = 0
x = 4
x + 6 = 0
x = -6
The answers are x = 4 and x = -6.
Hope this helps!
Chinedu sat down to do his homework, which included 30 math problems. He solved 2 problems each minute. Let f(n) be the number of problems left for Chinedu to solve at the beginning of the nth minute.
f is a sequence. What kind of sequence is it?
IS IT GEOMETRIC OR ARITHMETIC AND TELL ME THE EXPLICIT FORMULA
Answer:
Arithmetic sequence
f(n)=30-2(n-1)
Step-by-step explanation:
Chinedu's problem-solving sequence is arithmetic. The explicit formula for the sequence is f(n) = 32 - 2n.
Chinedu's homework problem involves a sequence where he solves 2 problems each minute, starting with 30 problems. To determine the number of problems left at the beginning of the nth minute, we can use an arithmetic sequence since the number of problems decreases by a constant amount (2 problems) each minute.
In an arithmetic sequence, the nth term can be expressed using the formula:
f(n) = a + (n - 1)d
where a is the first term and d is the common difference.
Steps:
Identify the first term (a), which is 30 (the total number of problems initially).Identify the common difference (d), which is -2 (since Chinedu is solving 2 problems each minute).Apply the formula:f(n) = 30 + (n - 1)(-2) = 30 - 2(n - 1) = 32 - 2n
So, the explicit formula for the sequence is f(n) = 32 - 2n.
Express 0.003259 in standard form correct to two significant figures
explain please
Answer:
5.9 x 10^-5
Step-by-step explanation:
Move the point to the right . The power of the exponent becomes negative because we’re moving the point from left to right. The opposite is the case if we move the point to the left .
To two significant figures, move the point until you have just two figures left. So
5.9 x 10^-5 is the answer
Answer: 3.3×10^-3
Step-by-step explanation:
0.003259 in standard form
When you see a standard form questions like this,you have to be patient
You will have to count the zeros backward
How many zeros are in front of the 3,that's two right
That means you take the decimal to the back of 3,that means the decimal is jumping three numbers
Since you are counting backward, that will be negative
So we have,
3.259×10^-3
Now to two significant figures
You will round up the 5 behind the 2 to 1 and add to the 2
Making 3,
So we have
3.3×10^-3
How do you find the x-intercepts of a
rational function?
Answer:
Step-by-step explanation:
PUT y or f(x) = 0......then find x
The Vehicle assembly building at Kennedy space center is a rectangular prism. It is 218 m long, 158 m wide and 160 m tall. There are four 139 m tall doors in the building, averaging 29 m in width. What is the buildings outside surface area when the doors are open?
Answer:
104,196 square meter
Step-by-step explanation:
This question can be solved by using the formula of area of four side in a
rectangular prism
In the given problem we have
Length of building = 218m
width of building = 158m
height of building = 160
Area of four walls is given by formula = 2*(L + B) * H
where L is length of rectangular prism
B is width of rectangular prism
H is height of rectangular prism
Therefore total surface area of building = 2*(218 + 158)* 160 = 376*320= 120,320
___________________________________________________
No of doors in the building = 4
length of door = 139m
width of door = 29 m
area of one door = length * width = 139* 29 = 4,031
area of four door = 4* 4,031 = 16,124
___________________________________________________
we have to find surface area of building when doors are open
To find this we can subtract total area of four door from total surface area of four walls which we have calculated above
total surface area of four walls - total area of four door
=> 120,320 - 16,124 = 104,196
104,196 is the buildings outside surface area when the doors are open
Which graph shows the function y=(1/3)3x?
Answer: y=0
Step-by-step explanation
Evaluate the expression x5/x2 for x =2
Answer:8
Step-by-step explanation:
Multiple 2 five times and multiple 2 two times than divide
2*2*2*2*2=32
2*2=4
32/4=8
Can someone help please?
Fill in the missing number
√□=14
For the square root of a number to be a whole number, we would need to have a perfect square. 14 is given to us, so to find the missing number, all we have to do is square 14 (or multiply it by itself).
14 x 14 = 196
The missing number is 196.
Hope this helps! :)
determine the slope of (5,6) & (3,9)???
Answer:
3/-2
Step-by-step explanation:
What is the next arithmetic sequence 1 3 5 7 9
Answer:
11
Step-by-step explanation:
You are adding 2 every time:
1+2=3
3+2=5
5+2=7
7+2=9
9+2=11
The next term in the sequence is 11.
Therefore the complete the series is : 1, 3, 5, 7, 9, 11 .
Arithmetic sequence : Sequence in which the difference between two consecutive terms is same .
Given, Arithmetic sequence : 1, 3, 5, 7, 9 .
So, after analyzing the sequence the common difference between two consecutive terms is 2.
Thus in the sequence add 2 to the first term , then the next term is obtained. Like,
1 + 2 = 3
3 + 2 = 5
5 + 2 = 7
7 + 2 = 9
Therefore the next term will be,
9 + 2 = 11
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A 12-foot ladder leans against the wall; the base of the ladder is 2 feet away from the wall.To the nearest tenth of a foot, how far up the wall does the ladder reach?
Solution:
The ladder, wall and base of the ladder from wall forms a right angled triangle
Length of ladder forms the hypotenuse
Length of ladder = 12 foot
base of the ladder from wall = 2 feet
To find: height of wall
By pythagoras theorem.
[tex]c^2 = a^2+b^2[/tex]
Where,
"c" is the Length of ladder
"a" is the base of the ladder from wall
"b" is the height of wall
Substituting the values,
[tex]12^2 = 2^2+b^2\\\\144 = 4 + b^2\\\\b^2 = 140\\\\b = \pm 11.832 \\\\Ignore\ negative\ value\\\\b \approx 11.8[/tex]
Thus, the ladder will reach a height of 11.8 feet on wall
Use the formula for the area to find the area of each light 7 inches . Use 3.14 for pi
Answer:
21.990 in circumference area 38.480 area in the square inches
Step-by-step explanation:
Answer: the area formula is A = πr2. Substitute the values of r (3.5 inches) and π (3.14) in the formula to find A:
A = 3.14 × (3.5)2 square inches
A = 38.465 square inches.
The area of each light is about 38.465 square inches.
Find the area of a circle with the circumference of 50.27 ft
Answer:
201.1ft²
Step-by-step explanation:
The area of the circle is 200.96 ft².
What is a circle?A circle is a two-dimensional figure with a radius and circumference of 2πr.
The area of a circle is πr².
We have,
Circumference of a circle = 2πr
This means,
2πr = 50.27 ft
π = 3.14
r = 50.27 / 2 x 3.14
r = 50.27 / 6.28
r = 8.005 ft
r = 8 ft
Now,
The area of the circle.
= πr²
= 3.14 x 8²
= 3.14 x 8 x 8
= 3.14 x 64
= 200.96 ft²
Thus,
The area of the circle is 200.96 ft².
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A storage locker measures 5 feet by 6 feet by
14 feet. How much space in the warehouse will
the storage locker occupy?
Answer:
[tex] 420 \: {feet}^{3} [/tex]
Step-by-step explanation:
Space occupied by storage locker in the warehouse will be equal to its volume.
[tex] \therefore \: volume \: of \: storage \: locker \\ = 5 \times 6 \times 14 \\ = 30 \times 14 \\ = 420 \: {feet}^{3} [/tex]
Hence, storage locker will occupy 420 cubic feet of space in the warehouse.
Scratchpad
Fabian needs 45 square feet of posterboard for an art project. He buys a sheet of posterboard with a length of
30 inches and a width of 2 feet. Which option correctly explains why this is enough posterboard for the project?
A
Yes, he will have enough posterboard because 2 x 12 = 24 inches. Then, 24 x 30 = 720 square inches,
and 720 = 60 square feet.
B
Yes, he will have enough posterboard because 10 = 2.5 feet. Then, 2.5 x 2 = 5 square feet.
C Yes, he will have enough posterboard because 39 = 2.5 feet. Then, 2.5 + 2 = 4.5 square feet.
D Yes, he will have enough posterboard because 30 x 2 = 60 square inches. Then, 99 = 5 square feet.
Answer:
The correct option is option (B)
Yes, he will have enough poster board because 10 = 2.5 feet. Then, 2.5 x 2 = 5 square feet .
Step-by-step explanation:
1 foot = 12 inches.
Fabian needs 45 square feet of poster board for an art.
Actually, the area of the poster is 4.5 square feet.
[Since the unit of 4.5 is square feet, so it is unit of area.]
He buys a sheet of poster board with length 30 inches and a width 2 feet.
The units of length and width are not same.
So, first we need to convert the width in inches.
The length of the sheet is = 30 inches
=(30÷12) inches
=2.5 feet.
Total area of the sheet = length×width
=(2.5×2) square feet
= 5 square feet
So, the area of sheet is more than the area of poster.
Yes, he will have enough poster board because 10 = 2.5 feet. Then, 2.5 x 2 = 5 square feet .
what basic trig identity would you use to verify that cotxsinx+cosx
Answer:
You use cotx = cosx/sinx.
Step-by-step explanation:
I guess you mean cotx sinx = cosx.
You substitute the identity cotx = cosx / sinx:
cotx sinx = (cosx / sin x) * sin x
The sin x ' s cancel to give cosx.
Final answer:
To verify that cot(x)sin(x) + cos(x) is a basic trigonometric identity, we can use the Pythagorean Identity which states that sin²(x) + cos²(x) = 1. The expression cot(x)sin(x) + cos(x) simplifies to 2cos(x), which confirms that it is a basic trigonometric identity.
Explanation:
To verify that cot(x)sin(x) + cos(x) is a basic trigonometric identity, we can use the Pythagorean Identity which states that sin²(x) + cos²(x) = 1. Let's start by expressing cot(x) in terms of sin(x) and cos(x). Since cot(x) = cos(x)/sin(x), we can substitute this into the equation:
cot(x)sin(x) + cos(x) = cos(x)/sin(x) * sin(x) + cos(x) = cos(x) + cos(x) = 2cos(x).
So, the given expression reduces to 2cos(x), which is indeed a basic trigonometric identity.
A box of a dozen breakfast bars costs $3.72, while a different box of six breakfast bars cost $1.92. Which is the better deal for the consumer and by how much?
Answer:
Better deal : dozen bars for $3.72 (It is a better deal by 12 cents)
Step-by-step explanation:
Since one has half of the amount that the other has, you multiply the price by two, and you end up with (for a dozen) $3.72, (and for 2 boxes of 6) $3.84. So, the singular box of a dozen bars wins.
:) Hope this helps! <3
Answer: the box of dozen is cheaper by 0.12
Step-by-step explanation:
3.72 /12= 0.31
1.92*2= 3.84
3.84/12= 0.32
3.84-3.72=0.12
identify the degree of the polynomial. 4x4 – 3x2 + 7x – 11
Answer: x=7x−1
Step-by-step explanation:
Angel and Jayden were at track practice.The track is 25 kilometers around.
•Angel ran 1 lap in. 2 min
• Jayden ran 3 laps in 5 min.
1.How many minutes does it take angel to run one kilometer what about Jayden?
2.how far does angel run in one minute?what about Jayden?
3.Who runs the fastest? How do u know ?
Please help especially with 1 and 2 plzz my parents are mad at me and I don’t understand A bit it’s already missing I will get a. 0
Answer:
1. Angel - 0.08 mins, Jayden - 0.067 mins
2. Angel - 12.5 km, Jayden - 15 km
3. Jayden runs faster.
Step-by-step explanation:
The length of the track (1 lap) is 25 km.
Angel ran 1 lap in 2 mins. That means he ran 25 km in 2 mins.
Jayden ran 3 laps in 5 mins. That means he ran 75 km (3 * 25 km) in 5 mins.
1. To find the time it takes to run 1 km, we divide the total time taken by the total distance run.
The number of minutes it takes Angel to run 1 km will be:
T = 2 / 25 = 0.08 minutes
The number of minutes it takes Jayden to run 1 km will be:
T = 5 / 75 = 0.067 minutes
2. To calculate the distance they run in 1 min, we divide the total distance run by the total time taken.
The distance Angel runs in 1 min is:
D = 25 / 2 = 12.5 km
The distance Jayden runs in 1 min is:
D = 75 / 5 = 15 km
3. Jayden runs faster because he runs more kilometres per minutes (15 km/min) than Angel (12.5 km/min).
In other words, Jayden clocks a faster speed than Angel.
The answer is 11 can someone tell me why?
Answer:
The sum of interior angles is found by using the following equation:
∑ of interior angles = (S - 2)180
S = sides.
Note that the sum is given to you, or 1620. Plug in 1620 for the sum:
1620 = (S - 2)180
Next, isolate the variable, s. Note the equal sign, what you do to one side, you do to the other. Divide 180 from both sides:
(1620)/180 = ((S - 2)180)/180
S - 2 = 1620/180
S - 2 = 9
Next, isolate the variable, s. Add 2 to both sides:
S - 2 (+2) = 9 (+2)
S = 9 + 2
S = 11
~
Step-by-step explanation:
to find the interior angles of a polygon, you must figure out 2 things: the number of angles, and what each measures
since there is 1620 for the angles and (n-2)180 = sum of int. angles, we can solve using this (n = the number of sides)
(n-2)180 = 1620
180n - 360 = 1620
180n = 1620 + 360
180n = 1980
1980/180 = n
n = 11 sides
Convert to scientific notation 0.0000089
Answer:
8.9 x 10^-6
Step-by-step explanation:
move decimal to the right so it makes a negative
8.9 x 10^-6
Answer:
8.9 x 10`6
Step-by-step explanation:
message me if you need a explanation