Answer:
4? I could be wrong. Sorry.
Step-by-step explanation:
Answer:
- 1
Step-by-step explanation:
f(x) + g(x) = - 2x² + 1 + 3x = - 2x² + 3x + 1
Substitute x = 2 into the expression for f(x) + g(x)
= - 2(2)² + 3(2) + 1 = - 8 + 6 + 1 = - 1
Answer:
D. 125 cm³
Step-by-step explanation:
Volume is how much space an object takes up.
The volume of a cube is denoted by: V = s³, where s is the side length of the cube. Here, we see that s = 5, so plug this into the formula:
V = s³
V = 5³ = 5 * 5 * 5 = 125
The answer is thus D.
Answer:
7. A = π
8. A = 6.25π
9. A = 16π
Step-by-step explanation:
When you have a bunch of similar problems that all use the same formula, it is usually convenient to solve the problem in generic terms, then put in the specific numbers.
You are asked to find A, and you are given the formula ...
To rewrite this as an equation for A, you divide by its coefficient, 4π.
If you like, you can go one step further, replacing C with kπ. Now, you have ...
__
7. k=2, A=(2^2)/4·π
A = π
__
8. k=5, A=(5^2)/4·π
A = (25/4)π
A = 6.25π
__
9. k=8, A=(8^2)/4·π
A = 16π