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bagirrra123 [75]
3 years ago
10

25 students in a class took an algebra test 20 students passed the test what percent passed help

Mathematics
1 answer:
marysya [2.9K]3 years ago
4 0

Answer:

80% of the students passed the algebra test

Step-by-step explanation:

So for this question, they want to know the percentage of the people that passed.

20 out of 25 students passed, we could find the percentage using two ways:

-------

1. We can use proportions to figure out the percentage (This can only work if the numbers are factorable by 100 such as 10, 25, 50...)

25 × 4 would equal 100. You must multiply the same number to the top as well.

So 20 × 4 = 80

--------

2. We can divide the two numbers

20 ÷ 25 = 0.8

When changed into a percentage, 0.8 would be 80%

-------

Have a good day :)

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Contact [7]

Answer:

All you have to do is multiply 56x80 and then you get the right answer which is 4480

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3 years ago
Jayden wants to lay sod on his front yard and on half of his back yard. His front yard has a length of 50 feet and a width of 70
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The first thing we must do for this case is to calculate the area of both yards.

We have then:

front yard:

A1 = (50) * (80)

A1 = 4000 feet ^ 2

Back yard:

A2 = (10) * (30)

A2 = 300 feet ^ 2

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Then, the total amount will be:

A = A1 + (1/2) A2

Substituting:

A = 4000 + (1/2) (300)

A = 4000 + 150

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Answer:

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6 0
2 years ago
Read 2 more answers
An aircraft seam requires 22 rivets. The seam will have to be reworked if any of these rivets is defective. Suppose rivets are d
SpyIntel [72]

Answer:

Part A:

p=0.0095

Part B:

p=0.0043

Step-by-step explanation:

Part A:

The number of rivets=22 rivets

Probability that no rivet is defective= (1-p)^22

The probability that at least one rivet is defective=1-(1-p)^22

For 19% of all seams need reworking, probability that a rivet is defective is given by:

1-(1-p)^{22}=0.19

(1-p)^{22}=0.81\\p=1-\sqrt[22]{0.81} \\p=0.0095

Part B:

For 9% of all seams need reworking, probability of a defective rivet is:

1-(1-p)^{22}=0.09\\p=1-\sqrt[22]{0.91} \\p=0.0043

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The answer is 17082 because you need to subtract the 2 numbers.
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