Question

Jenna buys 12 lb of meat. Some of the meat is chicken and costs $1.90/lb. The rest is beef, which costs $4.30/lb. She spends a total of $34.80.

Which equation models this situation?

Let c represent the number of pounds of chicken she buys.


A.
(1.9 + 4.3)(12 – c) = 34.8

B.
4.3c + 1.9(c + 14) = 34.8

C.
4.3c + 1.9(12) = 34.8

D.
1.9c + 4.3(12 − c) = 34.8

Answer 1

@gnech

Answer 2

i wanna say c

Answer 3

You can use the information to make two equations, one for the pounds, and one for the cost.

Total Pounds = Chicken + Beef
12 = C + B

Total Cost = Chicken Lbs * cost per lb + Beef Lbs * Cost per lb
34.80 = 1.90*C + 4.30*B

Answer 4

what is it

Answer 5

12 = C + B
34.80 = 1.90*C + 4.30*B

Here they went a step further and solved the first one for B, and substituted that B into the second one...

B = 12 - C
so
34.80 = 1.90*C + 4.30*(12 - C)

Answer 6

what?

Answer 7

@DanJS

Answer 8

That is how you do the problem, the last line is what they want...

Answer 9

ok