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3 years ago

(7x-10) (7x+5) (5x+55)

Mathematics

1 answer:

DIA [1.3K]3 years ago

8 0

Answer:

245x^2+2520x^2−2175x−2750

Step-by-step explanation:

=((7x−10)(7x+5))(5x+55)

=((7x−10)(7x+5))(5x)+((7x−10)(7x+5))(55)

=245x^3−175x^2−250x+2695x^2−1925x−2750

=245x^2+2520x^2−2175x−2750

Hope it helps :)

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Cody increased the amount of money he saves each week from $40 to $75. By

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Answer:

So Cody increase his savings by 87.5%

Step-by-step explanation:

We are given Cody's original savings = $40

We are given his new savings total = $75

Now, in order to find out the percentage we have to first find out by how much did he increase his savings:

Increase in savings = $75 - $40 = $35

So now we have the increase in savings we can find out the percentage:

$increase(\%) \: = \frac{increase \: in \: savings}{original \: savings} \times 100$

Now we plug in our values that we found:

$increase(\%) = \frac{35}{40} \times 100\\ increase(\%) = 87.5\%$

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3 years ago

Find each absolute value | 4+2i | | 5-i | | -3i |

galina1969 [7]

How to get answer for number 1: | 4+2i |

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How to get answer for number 2: | 5-i |

$\left|a+bi\right|\:=\sqrt{\left(a+bi\right)\left(a-bi\right)}=\sqrt{a^2+b^2}\\\mathrm{With\:}a=5,\:b=-1\\=\sqrt{5^2+\left(-1\right)^2}\\=\sqrt{26}$

Number 3 how to get answer: | -3i |

$\left|a+bi\right|\:=\sqrt{\left(a+bi\right)\left(a-bi\right)}=\sqrt{a^2+b^2}\\\mathrm{With\:}a=0,\:b=-3\\=\sqrt{0^2+\left(-3\right)^2}\\Refine\\=\sqrt{9}\\\sqrt{9}\\\mathrm{Factor\:the\:number:\:}\:9=3^2\\=\sqrt{3^2}\\\mathrm{Apply\:radical\:rule}:\quad \sqrt[n]{a^n}=a\\\sqrt{3^2}=3\\= 3$

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3 years ago

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If the outside diameter of a pipe is 36 inches, the length of a piece of insulation wrapped around it is...

myrzilka [38]

C is the correct answer I believe

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4 years ago

HELP need more help giving brainless and 15 points

arsen [322]

Answer:

Step-by-step explanation:

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3 years ago

Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gen

erma4kov [3.2K]

You need to use the binomial probability formula:
$p(k) = \frac{n!}{k!(n-k)!} p^{k} (1-p)^{n-k}$

where:
n = total number of events = 10
k = number of events we are testing = 6
p = probability of event happening = 0.5

$p(6) = \frac{10!}{6!(10-6)!} 0.5^{6} (1-0.5)^{10-6}$
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4 years ago