Answer: 110pi
Solution: S = 2•pi•r•h + 2 pi•r^2 =2•6•5pi + 2•pi•25 = 60pi + 50pi = 110pi
$40-$10=$30, so Betty spent $30 on the 12 packets of popcorn. This means that we need to share the $30 by 12 to find out how much each packet had cost. $30÷12=$2.50. Therefore, your answer is $2.50.
Y = 0.8
4x + 8y = 40
4x + 8*(0.8) = 40
4x + 6.4 = 40
4x = 40 - 6.4
4x = 33.6
x = 8.4
1. 2x + 50 = 100
subtract 50 on both sides and then divide by 2.
x = 25
180 - 100 = 80
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2. 7x - 4 = 87
add 4 on both sides and divide by 7.
x = 13
180 - 87 = 93
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3. 5x - 2 = 38
add both sides by 2 and divide by 5.
x = 8
180 - 38 = 142
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4. 14 + 6x = 134
subtract both sides by 14 and divide by 6.
x = 20
180 - 134 = 46
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5. x = 53
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6. x = 14
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