Question

Carly's age is 3 more than twice her sister's age, s. Which of the following expressions represents Carly's age?

Answer 1

choices:
2s + 3
3s + 2
2(s + 3)
s2 + 3

Answer 2

help? will medal and fan

Answer 3

which ones u think are wrong

Answer 4

So we are solving for C here which we'll call Carly's age, do you agree?

Answer 5

ok

Answer 6

C = something...first, what does `more than` imply?

Answer 7

more than twice her sister's age

Answer 8

??

Answer 9

Ok so how would you present that mathematically, if I had 3 apples more than snowy that would mean astro's apple = 3+snowy's apples right?

Answer 10

3c??

Answer 11

Similarly we can do this with your problem, so we have
`Carly's age is 3 more than twice her sister's age`

C = 3+something, what is the something?

Answer 12

her sister's age

Answer 13

I'm asking you to write it mathematically, her sisters age can be represented by s, how can we write this?

Answer 14

i am stuck there :/

Answer 15

Well at least you got the idea that the something is her sisters age so that's good! Now lets see if we can write it mathematically

Answer 16

So we her sisters age being represented by s, then we have
C = 3+s
right?

Answer 17

yes

Answer 18

But we're not done as Carly's age is 3 more than `twice her sister's age`

Answer 19

What can we do?

Answer 20

but we don't know her sisters age

Answer 21

Right...but that's not the point of the question. We're trying to model the sentence `Carly's age is 3 more than twice her sister's age` so if we were given s we could figure it out.

Since it says 3 more than twice her sister's age we would simply multiply s by 2. Now can you write the final equation out?

Answer 22

C = 3+2s right @snowystorm777 ?