Answer:
x=8
Step-by-step explanation:
3(x-1)-2(x-1)=7
3x-3-2x+2=7
x-1=7
x=8
Answer:
addition prop of equality
Step-by-step explanation:
youre welcome
Answer:
![\frac{7x + 7}{(x-3)(x+4)}](https://tex.z-dn.net/?f=%5Cfrac%7B7x%20%2B%207%7D%7B%28x-3%29%28x%2B4%29%7D)
Excluded values are 3 and -4
Step-by-step explanation:
To simplify the expression multiply to create a common denominator.
Multiply the first fraction by (x-3) and the second fraction by (x+4).
![\frac{3}{x+4} + \frac{4}{x-3}\\\\\frac{3(x-3)}{(x+4)(x-3)} + \frac{4(x+4)}{(x-3)(x+4)}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7Bx%2B4%7D%20%2B%20%5Cfrac%7B4%7D%7Bx-3%7D%5C%5C%5C%5C%5Cfrac%7B3%28x-3%29%7D%7B%28x%2B4%29%28x-3%29%7D%20%2B%20%5Cfrac%7B4%28x%2B4%29%7D%7B%28x-3%29%28x%2B4%29%7D)
![\frac{3(x-3)}{(x+4)(x-3)} + \frac{4(x+4)}{(x-3)(x+4)} \\\\\frac{3(x-3) + 4(x+4)}{(x-3)(x+4)}\\\\\frac{3x - 9 + 4x + 16}{(x-3)(x+4)}\\\\\frac{7x + 7}{(x-3)(x+4)}](https://tex.z-dn.net/?f=%5Cfrac%7B3%28x-3%29%7D%7B%28x%2B4%29%28x-3%29%7D%20%2B%20%5Cfrac%7B4%28x%2B4%29%7D%7B%28x-3%29%28x%2B4%29%7D%20%5C%5C%5C%5C%5Cfrac%7B3%28x-3%29%20%2B%204%28x%2B4%29%7D%7B%28x-3%29%28x%2B4%29%7D%5C%5C%5C%5C%5Cfrac%7B3x%20-%209%20%2B%204x%20%2B%2016%7D%7B%28x-3%29%28x%2B4%29%7D%5C%5C%5C%5C%5Cfrac%7B7x%20%2B%207%7D%7B%28x-3%29%28x%2B4%29%7D)
Excluded values are values which make the denominator 0. This means (x-3)(x+4) cannot be 0. This means x cannot be 3 or -4. These are excluded values.
Answer:
A, 16x^9
Step-by-step explanation:
You apply the function f to x, then apply the function f to that.
f(x)=2x^3
f(f(x))=f(2x^3)=2(2x^3)^3 = 2*2^3*(x^3)^3 = 2*8*x^(3*3)=16x^9