1) Lisa wants to buy a bicycle. The original price of the bicycle is $78, but it is on sale for 25% off. How much does Lisa pay for the bicycle if she buys it on
sale and pays a 6% sales tax on the sale
price?

( ͡° ͜ʖ ͡° ) copy and   paste it

step-by-step explanation:

idk

step-by-step explanation:

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