<span>3x(x^2+4)
= 3x^3 + 12x
hope it helps</span>
The answer is C because that's is a 90 degree angle. So you just subtract 70 from 90.
follow these steps:
1) y-4=7x^2
2) (y-4)/7 = x^2

so you must inverse x and y names:

Answer:
19x
Step-by-step explanation:
The cost of the racing cars was ...
2(5x) = 10x
The cost of the model motorcycles was ...
3(3x) = 9x
Peggy paid in total ...
10x + 9x = 19x
Answer:
<h2>-4</h2>
Step-by-step explanation:
Given the function f(x)=(x+4)², <u>the x intercept occurs at f(x) = 0,</u> substituting f(x) = 0 into the given equation to get the value of x we have;

Taking the square root of both sides

Subtracting 4 from both sides of the equation

Therefore the x intercept of the equation is -4