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Reil [10]
3 years ago
6

Uncle Ian spent $59 at a book store. He bought science fiction and mystery novels. The science fiction novels cost $7 apiece and

the mystery novels cost $9 apiece. If uncle Ian bought 7 novels, how many of each type did he buy?
Mathematics
1 answer:
zzz [600]3 years ago
5 0

Answer:

2 science fiction and 5 mystery

Step-by-step explanation:

First, we will set up a system of equations.

x (science fiction) y (mystery)

x + y = 7 This is the total books bought.

7x + 9y = 59 The amount of each set to the total cost.

Now we solve.

(-7)x + y = 7 equals

-7x - 7y = -49

added to

7x + 9y = 59

this equals

2y = 10

y = 5

Now we know one. We can plug it in to find the other value.

x + 5 = 7

x = 2

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GCF(22,48)=2


3 0
4 years ago
1440 tons of grain where brought to a silo over two days. On the second day 80 percent of the amount of the amount of the grain
katrin [286]

Answer:

1152 tons of grains

Step-by-step explanation:

We are told in the above question:

Total number of grains = 1440 tons of grain

On the second day 80 percent of the amount of the amount of the grain delivered during the first day where brought in.

Hence,

The number of grains brought in during the first day = 80% × 1440 tons

= 80/100 × 1440 tons

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3 years ago
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tiene que copiar sii el primero y segundo todos

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4 years ago
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tatiyna
New price is 1.05 because if you multiply 1.50 by .30 then your answer is 45. subtract 45 from 1.50 you get 1.05
6 0
3 years ago
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