3 years ago

7p +11 - 31 stuck at this one

Mathematics

1 answer:

Amanda [17]3 years ago

8 0

Answer:

7p -20

Step-by-step explanation:

7p +11 - 31

Combine like terms

7p -20

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4 years ago

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2 years ago

Which number line shows the solutions to<br> 1/2x – 2 > 0?

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Step-by-step explanation:

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3 years ago

A student gets 68 marks n therefore gets 85 percent total marks are?

mihalych1998 [28]

Answer:

There are 80 marks in total.

Step-by-step explanation:

Let the number of total marks be $x$ .

The percentage score of the student can be written as the ratio

$\displaystyle \frac{68}{x} = 85\%$ .

However,

$\displaystyle 85\% = \frac{85}{100}$ .

Equating the two:

$\displaystyle \frac{68}{x} = \frac{85}{100}$ .

Cross-multiply (that is: multiple both sides by $100x$ , the product of the two denominators) to get

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In other words, there are 80 marks in total.

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3 years ago

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7p +11 - 31 stuck at this one​

7p +11 - 31 stuck at this one