+ Rii
Test Review #1
Pre (AP) Math-7-1803033-37731P-1 / Percent / February 11-12, 2021 - Lesson 73
1. Which expression can be used to calculate a 6% increase in a value (U)?
16v
1.06
60
1.60

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

combine all like terms then its just a 2 step equation

the answer is c

step-by-step explanation: i took a test with this question on it