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3 years ago

Write the expression in factored form. m^4 - n^2

Mathematics

2 answers:

tester [92]3 years ago

8 0

$m^4-n^2=(m^2-n)(m^2+n)$

JulsSmile [24]3 years ago

8 0

(m^2+n)(m^2-n) is the factored form.

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Solve the following system using a matrix. 7a - b = -1 -4a - 2b = -2

Assoli18 [71]

1. a=-1+b/7 is the right answer. First you had to add by b from both sides of equation, and it gave us, $7a-b+b=-1+b$ . And then simplify, and it gave us, $7a=-1+b$ . Divide by 7 from both sides of equation, and it gave us, $\frac{7a}{7}=-\frac{1}{7}+ \frac{b}{7}$ . Finally simplify, and it gave us the answer is a=-1+b/7 is the right answer.

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2. a=-b-1/2 is the right answer. First you had to add by 2b from both sides of equation, and it gave us, $-4a-2b+2b=-2+2b$ . And then simplify, and it gave us, $-4a=-2+2b$ . Next you can also divide by -4 from both sides of equation, and it gave us, $\frac{-4a}{-4}=-\frac{2}{-4}+\frac{2b}{-4}$ . Finally simplify, and it gave us the answer is a=-b-1/2 is the right answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie

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3 years ago

Read 2 more answers

Alexandra uses 12 cups of water and 6 cups of dry rice to make 18 cups of cooked rice. Today, she wants to make 4 cups of cooked

LekaFEV [45]

The proportion that Alexandra can use to find r is 9 cups of water and 4 cups of dry rice

If Alexandra uses 12 cups of water and 6 cups of dry rice to make 18 cups of cooked rice, this can be expressed as:

$\frac{12}{6} = 18cups$

To get the proportion "r" for the amount of dry rice to use to make 4 cups of cooked rice, we can write:

$r = 4 cups$

Divide both expressions:

$\dfrac{\frac{12}{6} }{\frac{a}{b} } =\frac{18}{4}\\\dfrac{12b}{6a}= \frac{18}{4}\\\dfrac{2b}{a} =\frac{18}{4}\\\frac{b}{a} =\frac{18}{8}\\\frac{b}{a} =\frac{9}{4} =r$

Hence the proportion that Alexandra can use to find r is 9 cups of water and 4 cups of dry rice

Learn more on proportions here: brainly.com/question/19994681

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