What is the value of x² +2 x if x = 4

18

Step-by-step explanation: subsitute x^2 with 4^2 if x=4, and 4^2=16, so solve 16+2 and get 18. So, the answer is 18.

32

Step-by-step explanation:

4 times 4 is 8, 8+24

I hope this helps might be wrong if i didn't pick it up right

the first one, all those points on the line just make a strait line.

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17