Answer:

Step-by-step explanation:

Factor out 20 from the expression.

Take 20 as common.

Answer:
Step-by-step explanation:
a = 5b-10
a+b = 26
(5b-10)+b = 26
b = 6
a= 5b + 10 = 40
Answer:
its d
Step-by-step explanation:
the options can be eliminated by using common sense.
Step-by-step explanation:
sqrt(-4) = sqrt(4×-1) = sqrt(4)×sqrt(-1) = 2i