Examine (a), (b), and (c) and select the correct answer. (a) 50% of 20 (b) 30% of 90 (c) 25% of 80 a. 2(a) = (b) b. (b) - (a) = (c) c. (a) + (c) + (b) d. 2(a) = (c) (explanation would be appreciated)

First: solve the expressions

(a) 50% of 20= (.50*20)=10

(b) 30% of 90= (.30*90)=27

(c) 25% of 80= (.25*80)= 20

Next: use substitution

(a) 2(10)=(27) (this is not true)

(b) (27)-(10)=(20) (this is not true)

(c) (10)+(20)=(27) (this is not true)

(d) 2(10)=(20) (this is true)

Your answer is D. Hope this helps :)

answer: 7

step-by-step explanation: