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AnnyKZ [126]
3 years ago
7

For student spent $12 on school lunch at this rate find the amount 10 students would spend on the same school lunch?

Mathematics
2 answers:
Diano4ka-milaya [45]3 years ago
8 0
I think $120 
because 12*10=120
ASHA 777 [7]3 years ago
6 0
12 / 4 = 3
3 * 10 = 30
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The formula for a cylinder's volume  is
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π = 3.14
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1345.6 = 3.14 * 5.8^2 h Multiply 3.14 and 5.8^2 together.
1345.6 = 105.6 h  Divide by 105.6
1345.6 / 105.6 = h
h = 12.73 cm <<<< answer.
 I don't see anything wrong with what I've done but I don't see the answer anywhere. Estimating 1345 can be rounded to 1300. 
pi * 5.8^2 = 3 * 35 = 105 which we could round to 100.

1300 / 100 about = 13 So the answer should be in the region of 100.

I cannot see any reason to believe there is an error. If there is something that has not been copied correctly, I'd like to know what it is.

 
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2 years ago
A 40% antifreeze solution is to be mixed with a 70% antifreeze solution to get 240 liters of a 64% solution. How many liters of
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We have 40% antifreeze and 70% antifreeze and we need to make 240 liters of 64% antifreeze.

We set up 2 equations where "f" is the 40 % and "s" is the 70%

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To solve both equations we multiply A) by -.40

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f = 48

48 liters of 40% = 19.20 liters of antifreeze

192 liters of  70% = 134.40 liters of antifreeze

That equals 153.60 liters of antifreeze in a TOTAL liquid amount of 240 liters.

Double Check

153.60 / 240 = 64% antifreeze.

Step-by-step explanation:

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2 years ago
Expand then simplify: 12(2p-3)
avanturin [10]

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expanding ends in the simplest form: 24p-36

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