Question

Please help me, picture below

Answer 1

take the extreme case, the order is 26 books and all books cost $ 12.95

Answer 2

how much would this cost? (dont forget that each book cost an extra $ 0.50 shipping)

Answer 3

how much ?

Answer 4

cost = number of books * [cost per book + shipping per book]

Answer 5

13.45

Answer 6

yeah the total cost per book is 12.95+0.5=13.45

cost = number of books * [total cost per book]

Answer 7

what is the cost of 26 books?

Answer 8

. . . .

Answer 9

@Driana_18

Answer 10

im sorry im working on it give me a sec

Answer 11

i got 349.7

Answer 12

good, now remember this is the extreme case (most expensive),

which of the options are unreasonably high?

Answer 13

445 :) do you mind helping me with another one ?

Answer 14

ok

Answer 15

how do i work this out ?

Answer 16

$780 = $0.80n + $0.4m

n + m = 1200

solve the second equation for m, and sub into the first,

then solve for n

Answer 17

wait im confused how do i solve for m ? can you explain real quick ?

Answer 18

n + m = 1200

take n away form both sides

m =

Answer 19

ohhh m=1200

Answer 20

not quite, what happened to n?

Answer 21

i dont even know what im doing this is so confusing :/

Answer 22

n + m = 1200

take n away form both sides

n + m - n = 1200 - n

simplifying the left hand side

m =

Answer 23

1200-n ? im sorry if im wrong

Answer 24

thats correct m = 1200 - n

Answer 25

now sub m into

$780 = $0.80n + $0.4m

Answer 26

i think i did something wrong i got 1.84

Answer 27

you got 1.84 for what?

Answer 28

idk let me do it again

Answer 29

i keep getting the wrong answer smh

Answer 30

i have to go to the post office real soon