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tamaranim1 [39]
3 years ago
12

if you can buy 8 gallons of gas for $25.60, what is the cost per gallon? use a proportion to slove and show all work

Mathematics
2 answers:
Dmitriy789 [7]3 years ago
5 0

Answer:

25.60/8=3.2 because to find per gallon 8/8=1 and 25.60/8=3.2

Step-by-step explanation:

earnstyle [38]3 years ago
3 0

Set up a proportion:

 8 gallons                    1 gallon

------------------      =    -------------------

 25.60 dollars              x dollars

Then, cross multiply

8x= 25.60

x = 3.20 dollars

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Number of dimes were 81 and number of quarters were 47

<em><u>Solution:</u></em>

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value of 1 dime = $ 0.10

value of 1 quarter = $ 0.25

<em><u>Given that There are 128 coins in all</u></em>

number of dimes + number of quarters = 128

d + q = 128 ------ eqn 1

<em><u>Also given that collection of dimes and quarters is worth $19.85</u></em>

number of dimes x value of 1 dime + number of quarters x value of 1 quarter = 19.85

d \times 0.10 + q \times 0.25 = 19.85

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<h3>d = 81</h3>

Thus number of dimes were 81 and number of quarters were 47

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