If the square root of x = 9, then x is
a) 15 and 20
b) 2 and 3
c) 80 and 90
d) 4 and 5

D 80 and 90

Step-by-step explanation:

using reverse problem solving

square root x = 9 then

9 squared =81

81 between 80 and 90

on a coordinate grid, point a is at (−4.0, −2.4) and point b is at (4.0, −2.4). point b is a reflection of point a across the –axis. input either a lowercase x or i think is the right awnser

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9