How do I solve this properly?

x 4

Step-by-step explanation:

4x^2 - 64 0 ; move 64 over

4x^2 64 ; divide by 4

x^2 16 ; take square root of both sides

x 4

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option