Answer: 10 : 9
Step-by-step explanation:
GIVEN
20 girls tried out
18 boys tried out
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The final ratio should be girl to boy
girl to boy
=20 : 18
=10 : 9 ⇔ divide 2 on both sides (simplify the ratio)
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the average can be calculated by adding the scores together and then dividing by the number of scores.
we can set up an equation:
let x = test score needed on next test
(72+72+80+x)/4 = 71
multiply both sides by 4
72+72+80+x = 284
add like terms
224+x=284
subtract 224 from both sides
x=60
she will need a 60 for her average to be 71
Answer:
Step-by-step explanation:
Answer:
153.9ft squared
Step-by-step explanation:
Use the calculation given
r = radius, so half the number given (14 is the diameter)
3.14 x (7 squared) = 153.9ft
