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kap26 [50]
3 years ago
9

Ryan bought several pens at Staples, for 60 cents each. Spending the same amount of money at Rite Aid, Ryan then bought some pen

s that cost 80 cents each. In all, 42 pens were bought. How many pens did Ryan buy at Rite Aid?
Mathematics
1 answer:
Amanda [17]3 years ago
3 0

Answer:

24 Pens For Staples and 18 For Raid Aids

Step-by-step explanation:

Ryan spent the same amount of money on both brands

In total, he had bought 42 pens.

So, I have to make a graph and find out at what point did they gain the same amount of money.

Staples:  [s]

.60s (This would be the equation for Staples)

Rite Aid: [r]

.80r (This would be for Rite Aid)

Staples                               Rite Aid              

<u>x | y  </u>                                   <u>x | y</u>

1 | .60                                  1 | .80

2 | 1.2                                  2 | 1.6

3 | 1.8                                  3 | 2.4

4 | 2.4                                4 | 3.2

5 | 3.0                                 5 | 4.0

At 4 pens Staples reach $2.4, while at 3 pens, Rite Aid got $2.4

So then he would have bought 7 pens. But we're looking for 42, which is 6x this amount.

Since the amount of is 6x more, I'll multiply each of the amount of pens by 6.

6(4) = 24 Pens at Staples

6(3) = 18 Peans at Raid Aids

In totals they have 42 pens, but we have to check if they reach the same price.

.60(24) = $ 14.4

.80(18) = $ 14.4

We can now reach to a conclusion that these two amounts are correct.

The amount of pens he bought from each brand(s) are:

Staple: 24 Pens

Raid Aids: 18 Pens

(Sorry I took a while, I was trying to make the graph and stuff!)

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