2 years ago

In an experiment, what happens to the independent variable?

1 answer:

7 0

Step-by-step explanation:

It is purposely changed or manipulated.

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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

$85x = 68\times 100$ .

$\displaystyle x = \frac{68\times 100}{85} = 80$ .

In other words, there are 80 marks in total.

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nataly862011 [7]

C I think sorry if I’m wrong

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Elden [556K]

You just Said it it's 0,6666666666...

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2 years ago

belka [17]

the most groups she can have is 10

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attashe74 [19]

The answer is 7 teaspoons for one cup

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