Latrice is buying her college textbooks. at the bookstore, she finds her math book for $82.99 and her history book for $112.89. sales tax is 7.5%. online she finds the math book for $90.20 and the history book for $118. shipping is a flat rate of $20, or free if you spend at least $125. no sales tax is charged. where should she purchase each textbook to get the least possible price?

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse