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3 years ago

Help me please I have no idea what the answer is

Mathematics

1 answer:

joja [24]3 years ago

4 0

Answer:

-21/10

Step-by-step explanation:

-2/5 - 4/5 = -6/5 <--

a common denominator

Then...

-6/5 -9/10 = -21/10

There is not a common denominator so you have to multiply 2 to the -6/5 to make it -12/10

The answer can be left as an improper fraction which is -21/10

or a mixed number -2 1/10 th

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The average of eight numbers is 56. When one of the numbers was left out, the mean decreased to 54. What number was left out?

Alexandra [31]

The number that was left out is 70.

<h3>What is the number that was left out?</h3>

Average is the sum of a set of numbers divided by the total numbers in the data set.

Average = sum of numbers / total numbers

Sum of numbers when there are 8 numbers = 56 x 8 = 448
Sum of numbers when there are 7 numbers = 54 x 7 = 378
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To learn more about average, please check: brainly.com/question/25842202

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4 years ago

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4vir4ik [10]

Answer:

$\displaystyle g^{-1}(x)=\frac{-7+2x}{x-2}$

Step-by-step explanation:

We are given the function:

$\displaystyle g(x)=-\frac{3}{x-2}+2$

Let's find the inverse of g.

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$\displaystyle y=-\frac{3}{x-2}+2$

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$y(x-2)=-3+2(x-2)$

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$\displaystyle x=\frac{-7+2y}{y-2}$

Interchange variables:

$\displaystyle y=\frac{-7+2x}{x-2}$

Call y as the inverse function:

$\boxed{\displaystyle g^{-1}(x)=\frac{-7+2x}{x-2}}$

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3 years ago

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Answer:

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Step-by-step explanation:

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Help me please I have no idea what the answer is​

Help me please I have no idea what the answer is