3 years ago

Please help on this 2 questions I have

Mathematics

1 answer:

Nataly [62]3 years ago

7 0

The left one is 4 and the right one is 10. 2(4)+5=13 and 1+2(10)=21

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Simplify 25^ - 1/2 Please explain! I know the answer is 1/5 but why?

lisov135 [29]

$(25)^{-\frac{1}{2} }$

When the exponent is negative, you have to make the number a fraction(1 over the number).

For example:

$25^{-2} = \frac{1}{25^{2} }$

$x^{-1} =\frac{1}{x^{1} }$

This gets rid of the negative, but it leaves the exponent

$(25)^{-\frac{1}{2}} = \frac{1}{25^{1/2}}$

When an exponent is a fraction, it is the square root.

For example:

$x^{\frac{1}{3}} = \sqrt[3]{x}$

$x^{\frac{1}{2}} =\sqrt{x}$

$x^{\frac{1}{4}}=\sqrt[4]{x}$

So...

$\frac{1}{25^{1/2}} = \frac{1}{\sqrt{25} } = \frac{1}{5}$

3 0

3 years ago

Divide. Write the answer in simplest form 1/8 divided by 1/4

andreev551 [17]

1/8*4=4/8=1/2--> the correct answer to this equation.

5 0

3 years ago

Tony is interested in the favorite activities of the students in his school. He surveys all the members of the school's chess cl

Alinara [238K]

No because he only surveyed the members of the chess club

7 0

2 years ago

Solve −4 = −(−k − 86)+10

kvasek [131]

K= 100

You use distributive property

Step 1: −(−k)−1(−86)+10=−4

Step 2: k−1(−86)+10=−4

Step 3: k+86+10=−4

Step 4: k+96=−4

Step 5: k=−96−4

Step 6: Subtract 4 from −96 to get −100.

3 0

3 years ago

Read 2 more answers

Order from least to greatest: |3|, -|-5|, 0, |-4|

uysha [10]

-|-5|, 0, |3|, then |-4|
Hope that helps.

7 0

4 years ago

Read 2 more answers