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AnnyKZ [126]
2 years ago
12

Marcus wanted to buy his mom a Christmas present and planned to spend $100. He ending up finding a really great present but actu

ally had to pay $120.50. What was his percent of error? Show your work and explain your solution.
Mathematics
2 answers:
Flura [38]2 years ago
8 0
Yes the answer is this
dedylja [7]2 years ago
6 0

Answer:

The percent of his error is 20.5%

Step-by-step explanation:

subtract 100 from 120.50 and then divide the answer by 100. Then move the decimal point two places to the right to get 20.5%.

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babymother [125]

Answer:

The general plan is to find BM and from that CM. You need 2 equations to do that.

Step One

Set up the two equations.

(7 - BM)^2 + CM^2 = (4*sqrt(2) ) ^ 2 = 32

BM^2 + CM^2 = 5^2 = 25

Step Two

Subtract the two equations.

(7 - BM)^2 + CM^2  = 32

BM^2 + CM^2         = 25

(7 - BM)^2 - BM^2 = 7               (3)

Step three

Expand the left side of the new equation labeled (3)

49 - 14BM + BM^2 - BM^2 = 7    

Step 4

Simplify And Solve

49 - 14BM = 7              Subtract 49 from both sides.

-49 - 14BM = 7 - 49

- 14BM = - 42              Divide by - 14

BM = -42 / - 14

BM = 3

Step  Five

Find CM

CM^2 + BM^2 = 5^2

CM^2 + 3^2 = 5^2        Subtract 3^2 from both sides.

CM^2 = 25 - 9            

CM^2 = 16                     Take the square root of both sides.        

sqrt(CM^2) = sqrt(16)

CM = 4    < Answer

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Both faces area formula

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Step-by-step explanation:

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