Question

Variable c is 5 more than variable a. Variable c is also 3 less than variable a. Which pair of equations best models the relationship between c and a?

c = a − 5
c = a + 3
a = c + 5
a = 3c − 3
a = c − 5
a = 3c + 3
c = a + 5
c = a − 3

Answer 1

Variable c is 5 more than variable a

to change that into "math"
you can think of "is" as meaning =
so we can change
"Variable c is"
to
c =

now for the rest: : 5 more than variable a

to figure this out, do you know what 5 more than 1 is ?

Answer 2

Is it D?

Answer 3

do you know what 5 more than 1 is ?

Answer 4

6

Answer 5

and 5 more than 2 is 7
how do you get 7 from 5 and 2. what do you do?

Answer 6

the idea is to learn these tricks on how to translate the English to math.

Answer 7

you know 5 more than 1 is 6
but how did you get 6?

Answer 8

Adding.

Answer 9

and how do you write 5 added to 1 ?

Answer 10

5 + 1

Answer 11

now we use letters, but the same idea
5 more than a

Answer 12

I know

Answer 13

in which case you get
c= 5+a
for the first equation

it looks like the only choice with that equation is D
we don't have to check the other equation, but it would be helpful
(may as learn how to do this)

Answer 14

Variable c is also 3 less than variable a.

to get the idea, I would first use a number for "a"
3 less than 4 is 1
3 less than 5 is 2
so it looks like we are doing 4-3 or 5-3
or using "a"
a-3

Answer 15

and the 2nd equation is
c= a-3

which again is choice D

Answer 16

I already knew that I just wanted someone else's opinion. Thanks either way. :]