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3 years ago

7

What percent of 82 is 10.25

1 answer:

igor_vitrenko [27]3 years ago

4 0

Answer:12.5

Step-by-step explanation:

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The correct answer is:

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2 years ago

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Which polynomial identity will prove that 49-4=45

goldfiish [28.3K]

Consider the polynomial identity (difference of squares):
(x+y)(x-y) = x² - y²

Set x =7 and y = 2 to obtain
(7+2)*(7-2) = 7² - 2²
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45 = 49 - 4
This is the result required, obtained by using difference of squares.

Answer: Difference of squares.

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2 years ago

the book fair had a sale where 6 book were $20.46 if you wanted to buy 7 books ,how much money would you need ?

Rina8888 [55]

Answer:

$23.87

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2 years ago

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I need help please.

makkiz [27]

Answer:

see explanation

Step-by-step explanation:

Using the rules of radicals/ exponents

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$

$a^{\frac{m}{n} }$ ⇔ $\sqrt[n]{a^{m} }$

Simplifying each term

7 $\sqrt{x^{3} }$ = 7 $x^{\frac{3}{2} }$

x $\sqrt{9x}$

= x × $\sqrt{9}$ × $\sqrt{x}$

= x × 3 × $x^{\frac{1}{2} }$

= 3 × $x^{(1+\frac{1}{2}) }$

= 3 $x^{\frac{3}{2} }$

Subtracting the 2 simplified like terms, that is

7 $x^{\frac{3}{2} }$ - 3 $x^{\frac{3}{2} }$

= 4 $x^{\frac{3}{2} }$ ← return to radical form

= 4 $\sqrt{x^{3} }$

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2 years ago