Armando leaves a 20% tip on a dinner bill of 12.50. how much tip does he leave? a. $0.25 b. $1.50 c. $2.50 d. $3.75 i will report you if your messing around

Pls! does anybody know a shortcut for answering these types of questions in the future?

The box plot shows the number of raisins found in sample boxes from brand c and from brand d. each box weighs the same. what could you infer by comparing the range of the data for each brand? a) a box of raisins from either brand has about 28 raisins. b) the number of raisins in boxes from brand c varies more than boxes from brand d. c) the number of raisins in boxes from brand d varies more than boxes from brand c. d) the number of raisins in boxes from either brand varies about the same.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?