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3 years ago

Mary got 85% correct on her math test. Mary missed 6 questions. How many total questions were on her math final?

Mathematics

2 answers:

ipn [44]3 years ago

6 0

Mary had 40 questions on the test.

Solnce55 [7]3 years ago

5 0

Answer: there were 40 questions on her math final.

Step-by-step explanation:

Let x represent the total number of questions in the math test.

Mary got 85% correct on her math test. This means that the number of questions that she got right is

85/100 × x = 0.85 × x = 0.85x

This also means that the number of questions that she missed would be

x - 0.85x = 0.15x

Therefore, if Mary missed 6 questions, it means that

0.15x = 6

Dividing both sides of the equation by 0.15, it becomes

0.15x/0.15 = 6/0.15

x = 40

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Answer:

Step-by-step explanation:

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1 year ago

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3 years ago

The length of a rectangle is 3 inches more than the width. The area is 10 square inches. Find the dimensions

mr_godi [17]

Answer:

Width = 2

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Step-by-step explanation:

let A be the area of the rectangle

L be the length of the rectangle

w be the width of the rectangle

Formula: ‘area of a rectangle’

A = L × w

…………………………………………………

A = L × w

⇔ 10 = (w + 3) × w

⇔ 10 = w² + 3w

⇔ w² + 3w - 10 = 0

Solving the quadratic equation w² + 3w - 10 = 0 :

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then √Δ = 7

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-5 is not valid ,because w represents the width

which must be a positive number

Then w = 2

Conclusion:

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