When 'b' increases from 1 to 5, the period decreases.

True or False

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.