Answer: simplified expression is 3x+5
Explanation:
3(x+3)-4
-Distribute (multiply) 3 through parentheses to get
3x+9-4
-subtract the 9 and 4 to get
3x+5
That’s your solution to a simplified equation!!
F(x) = x-5
X=8
Then plug in x as 8
8-5=3
Answer: D and F
Step-by-step explanation:
(x-1)(x-1)
=x^2-x-x+1
=x^2-2x+1
(x+7)(x-7)
=x^2-7x+7x-49
=x^2-49
Answer: 20.2 mph
Step-by-step explanation:
Given
Train travels 10.1 miles in half an hour i.e.
Distance 
time 
we know, 
Insert the values
