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Veseljchak [2.6K]
3 years ago
11

I bought three pencils costing 18 cents each. how much change did I get from $1​

Mathematics
2 answers:
melamori03 [73]3 years ago
7 0

Answer:

15 pencils

Step-by-step explanation:

18c/3

x/1

cross multiply then divide

coldgirl [10]3 years ago
4 0

Answer:

46 cents

Step-by-step explanation:

18 x 3 = 54

100 - 54 = 46

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A 15 ounce alloy containing 30% gold was mixed with an alloy containing 5% gold to get an alloy containing 20% gold. How many ou
Studentka2010 [4]

Answer:

4.5 % alloy

Step-by-step explanation:

Let x = amt of 30% alloy

The resulting total is to be 25 oz, therefore:

(25-x) = amt of 5% alloy:

A typical mixture equation:

.30x + .05(25-x) = .20(25)

.30x + 1.25 - .05x = 5 .30x - .05x = 5 - 1.25

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x = 3.75%2F.25

x = 15 oz of 30% alloy required

then

25-15 = 10 oz of 5% alloy:

Check solution

.30(15) + .05(10) = .20(25)

4.5 + .5 = 5

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3 years ago
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Step-by-step explanation:

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3 years ago
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The value of 63−−√ lies between which two consecutive integers?
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3 0
3 years ago
Can you double a square with a straightedge and a compass?
sergejj [24]
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At a garage sale, each book is priced the same price You purchase 3 fiction books, 5 picture books, 2 non fiction books, and 4 p
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Answer:

3x+5x+2x+4x

Step-by-step explanation:

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3 years ago
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