Question

Christa buys 14 flowerpots. Some are small and cost $2.40 each. The rest are large and cost $5.60 each. She spends a total of $49.60.

Which equation models this situation?

Let s represent the number of small flowerpots she buys.


A.
5.6s + 2.4(s + 14) = 49.6

B.
(2.4 + 9.6)(14 – s) = 49.6

C.
2.4s + 5.6(14 – s) = 49.6

D.
5.6s + 2.8(14) = 49.6

Answer 1

. you are correct.

2.let number of small small pots she buys = s
total cost of small pots = 2.4s
Total number of pots bought = 14
So number of large pots bought = 14-s
total cost of large pots = 5.6(14-s)

Total cost = 2.4s + 5.6(14-s) = 49.6

3. Let they have same amount of money in x months.
Mira will have in her account = 760 - 40x
Paulina will have in her account = 210 + 70x
Since both have equal amount,
760 - 40x = 210 + 70x
⇒ -40x - 70x = 210 - 760
⇒-110x = -550
⇒ x = (-550)/ (-110)
⇒x = 5 months

Answer 2

In other words: C