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Molodets [167]
3 years ago
6

Number 10 please help

Mathematics
1 answer:
WARRIOR [948]3 years ago
7 0
300/ 15 = 20
divide bar graph into 20 equal sections
each section represents one week

algebra
number of weeks = x
15x = 300
x = 300/15
x = 20
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The number of liters of 50% antifreeze solution is 50 and the number of liters of 90% antifreeze solution is 150

Step-by-step explanation:

Let

x ----> number of liters of 50% antifreeze solution

y ----> number of liters of 90% antifreeze solution

we know that

50%=50/100=0.50

90%=90/100=0.90

80%=80/100=0.80

x+y=200

x=200-y ------> equation A

0.50x+0.90y=0.8(200) -----> equation B

substitute equation A in equation B and solve for y

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Find the value of x

x=200-y

x=200-150=50 liters

therefore

The number of liters of 50% antifreeze solution is 50

The number of liters of 90% antifreeze solution is 150

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