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3 years ago

12

Erika calculated that she would spend $115 on school supplies this year. She actually spent $82.50 on school supplies. What is E

rika’s percent of error?

1 answer:

nordsb [41]3 years ago

3 0

28.26% is your answer.

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3 years ago

Which expression is equivalent to the expression (x^2-y^2)^2

Pepsi [2]

Step-by-step explanation:

$(x^2-y^2)^2\\\\\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=(x^2)^2-2(x^2)(y^2)+(y^2)^2\\\\\text{use}\ (a^n)^m=a^{nm}\\\\=x^4-2x^2y^2+y^2\\-----------------------------$

$\text{Other solution}\\\\(x^2-y^2)^2\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\= [(x-y)(x+y)]^2\\\\\text{use}\ (ab)^n=a^nb^n\\\\=(x-y)^2(x+y)^2$

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3 years ago

Dollhouse furnishing comes in different sizes depending on the size of the dollhouse. Write a ratio of the size of the dollhouse

Pani-rosa [81]

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Step-by-step explanation:

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3 years ago

Hey circular plot of land has a diameter of 14 yards what is the area of the land use 3.14 for pie

vagabundo [1.1K]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Perimeter of triangle? <br>need some help please!

pychu [463]

You need to subtract the numbers for 180 and you will have the answer

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3 years ago