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OlgaM077 [116]
3 years ago
5

An algebra class normally has y students, but today it is just 2/3 full. Express the number of students in class today terms of

y.
Mathematics
1 answer:
sertanlavr [38]3 years ago
3 0

Answer:

2/3y

Step-by-step explanation:

If the class usually has y students and has 2/3 today, it can be represented by 2/3y.

Since multiplying a number or variable by 2/3 makes it 2/3 of the amount, 2/3y will represent the people in the class.

So, in terms of y, 2/3y represents the number of students in class today.

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Use the quadratic formula to solve this equation to 3sf: 5x^2-2x-11=0
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Complete the equation. (x-2)(x^2 + 2x + 4) = ( , )
yanalaym [24]

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Step-by-step explanation:

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6 0
2 years ago
A suitcase measures 24 inches long and the diagonal is 30 inches long. How much material is needed to cover one side of the suit
azamat

Answer:

I believe you're supposed to solve for the other missing side. If you know a side (a) and the diagonal or also known as the hypotenuse (c), you will be able to solve for the other side using the Pythagorean theorem.

Step-by-step explanation:

a^2+b^2=c^2 Substitute the values for a and c

24^2+b^2=30^2 Solve for the powers

576+b^2=900 Subtract 576 from both sides

b^2=324 Solve for the root of 324

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You would need 18 inches of material to cover one side of the suitcase.

8 0
3 years ago
A cyclist estimates that he will bike 80 miles this week. He actually bikes 75.5 miles. What is the percent error of the cyclist
maw [93]

Answer:

<em>The percent error of the cyclist's estimate is 5.63%</em>

Step-by-step explanation:

<u>Percentages</u>

The cyclist estimates he will bike 80 miles this week, but he really bikes 75.5 miles.

The error of his estimate in miles can be calculated as the difference between his estimate and the real outcome:

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To calculate the error as a percent, we divide that quantity by the original estimate and multiply by 100%:

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Rounding to the nearest hundredth:

The percent error of the cyclist's estimate is 5.63%

5 0
3 years ago
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