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abruzzese [7]
3 years ago
13

A cylinder. The radius is labeled r and the height is labeled h.

Mathematics
1 answer:
jenyasd209 [6]3 years ago
7 0

Answer:

2, and 5

Step-by-step explanation:

. V = B( h )

. V = (pi) (r squared) (h)

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The sum of -4 and 8 times a number is multiplied by 3. The result is 15 less that 25 times the number. What is the number?
mash [69]
3(-4 + 8x) = 25x - 15
-12 + 24x = 25x - 15
25x - 24x = -12 + 15
 x = 3

answer is
<span>D) 3</span>
4 0
3 years ago
Which equation is not a quadratic equation?
BabaBlast [244]
A quadratic equation is usually in the form:

ax^{2} +bx +c

where a, b and c are the coefficients of the expression and a ≠ 0. 

If a = 0, the equation becomes a linear expression and is no longer quadratic.

Hence, in the above options; y = 5x -2 is the only one that is not a quadratic equation.
8 0
3 years ago
Which of the following points lies on the line?
Bond [772]

Answer:

C. (3,-3)

Step-by-step explanation:

5x + 3y = 6

5(3) + 3(-3) = 6

15 + (-9) = 6

therefore point lies on the line

8 0
2 years ago
If f ( 4 ) = − 2 , write an ordered pair that must be on the graph of y = f ( x + 4 ) + 1
AlekseyPX

We have been given that

y = f ( x + 4 ) + 1\\&#10;\\&#10;f(4)=-2

Now, we need to find an ordered pair that must be on the graph of

y = f ( x + 4 ) + 1

On substituting x=0 in the above equation, we get

y = f ( 0 + 4 ) + 1\\&#10;\\&#10;y=f(4)+1\\&#10;\\&#10;\text{On substituting the value of f(4)= -2, we get}\\&#10;\\&#10;y=-2+1\\&#10;y=-1

Therefore, the required ordered pair is given by (0,-1)

4 0
3 years ago
Washing his dad's car alone, eight-year-old Levi takes 2.5 hours. If his dad helps him, then it takes 1 hour. How long does it t
Dmitry [639]

Answer:

Levi's dad takes 1.67 hours to wash the car by himself

Step-by-step explanation:

* Lets explain how to solve the problem

- Levi takes 2.5 hours to wash his dad's car alone

- Levi and his dad take 1 hour to wash the dad's car together

∵ Levi takes 2.5 hours to wash the car alone

∴ The rate of Levi is 1/2.5 car/hr

∵ His dad takes x hours to wash the car alone

∴ The rate of his dad is 1/x car/hr

∵ They working together for 1 hour to wash the car

- The equation of the work is rate of Levi × t + rate of his dad × t = 1

∵ t is the time of working together

∵ t = 1 hour

∴ \frac{1}{2.5}(1)+\frac{1}{x}(1)=1========\frac{1}{2.5}+\frac{1}{x}=1

- Multiply both sides by 2.5x to cancel the denominators

∵ \frac{1}{2.5}(2.5x)=x=====\frac{1}{x}(2.5x)=2.5

∵ 1 × (2.5x) = 2.5x

∴ x + 2.5 = 2.5x

- Subtract x from both sides

∴ 2.5 = 1.5x

- Divide both sides by 1.5

∴ x = 5/3 ≅ 1.67

∵ x is the the time of his dad to wash the car alone

∴ Levi's dad takes 1.67 hours to wash the car by himself

3 0
3 years ago
Read 2 more answers
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