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yawa3891 [41]
3 years ago
8

If 20 out of 25 students in a P.E. class are boys, what percent of the class is made up of boys?

Mathematics
1 answer:
Ivanshal [37]3 years ago
4 0
80% !
hope this helps
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Answer:

Fraction form:       1/729

Decimal form:      0.00137174...

Exponent form:   3^-6

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Solve these system of linear equations:
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1.solve for y
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3 years ago
Ava and Maria went shopping together. Eva spent $20 more than Maria. Together they spent $209.84. Write and solve an equation to
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3 years ago
During a tunnel construction project, engineers used explosives to excavate partway into a mountain. Because of time constraints
AnnyKZ [126]

The given data can be tabulated as:

number of days,x                            length of tunnel (ft), y

0                                                                              225

5                                                                              350

20                                                                           725

30                                                                           975

55                                                                           1,600

 

To check if the growth is linear, the slope at points (0, 225) and (5, 350), and (0, 225) and (20, 725) should be equal. The formula for slope is:

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m = (725 – 225) / (20 – 0) = 25

 

Therefore the equation is linear in the form of:

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The complete equation is:

y = 25x + 225

 

At x = 86 days

y = 25(86) + 225

y = 2,375 ft

 

Therefore the length of the completed tunnel is 2,375 feet.

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