Answer:
b
Step-by-step explanation:
im pretty sure
C. -24
Plug in values into the given equation
C
Multiply the top and bottom, both by sqrtx-sqrt5. This is in order to rationalize the denominators.
You get answer C.
40
Let the number be y
-1/2 × y = -20
y = -20 ÷ -1/2
y = 20 × 2
y = 40
