Is the expression a valid way to calculate a 15% tip on a cab fare of d dollars? Answer yes or no

EXPRESSION

0.10d + 0.05d Yes or No

0.85d Yes or No

1.015d Yes or No

0.15d Yes or no

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?