Question

Which of the following expressions could give the total amount of a $45 restaurant bill with a 15% tip added on?
Will medal and fan.

Answer 1

which are the expressions? :)

Answer 2

a. (0.15)($45)
b. (1.15)($45)
c. 1 + (0.15)($45)
d. $45 + 0.15

Answer 3

do you have any ideas?

Answer 4

I think it is a. or d. but I have a feeling that its wrong.

Answer 5

okies. hmm, maybe if we try finding out what 15% of 45 is.
do you know how to find that?

Answer 6

No, not really.

Answer 7

ok :) this is sort of a cheater way but.here we go
to find out 1% you divide 45 by 100
does it make sense why?

Answer 8

No, not really. Why?

Answer 9

because 100% is the full amount
so 45 = 100% in this case.

Answer 10

Oh, yeah now I understand. Then what do I do?

Answer 11

Sorry pc got super stuck D:

Answer 12

so you have
45/100 = ?

Answer 13

45/100 = 0.45. Oh! We have to add 0.45 with 0.15! 0.45+ 0.15 = 0.60 or 0.6! Thank You!

Answer 14

did you get it? haha
which letter answer did you get?

Answer 15

well we want to make sure our answer doesn't give us just the tip money but the tip money + 45$

Answer 16

I got d.

Answer 17

Is it right?

Answer 18

not quite

Answer 19

ok so
45/100 = will give you the 1%
what does 45/100 = ?

Answer 20

45/100 = 0.45

Answer 21

good. Now, since we want 15% and not just 1%
you need to do
0.45 x 15 = ?

Answer 22

0.45 x 15 = 6.75?

Answer 23

Yes!! so $6.75 is how much the tip is

Answer 24

Now, the question asks for the equation that gives the
$45 + tip
or
$45 + 6.75
so that = ?

Answer 25

So we have to do $45 + $6.75?

Answer 26

yes! :) what does that equal?

Answer 27

Oh! $51.75! Right?! Thank you!

Answer 28

Yes.
So now find the equation that gives you that answer

Answer 29

Thank you a million times!

Answer 30

What was your answer now? :)

Answer 31

I got c. Is it right?