4 years ago

A student answered 13 out of 20 correct on a test what percentage did he not get correct

Mathematics

1 answer:

nirvana33 [79]4 years ago

5 0

35% he got incorrect

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Lindsay Skyler and Valerie are sisters Lindsey is 8 years older than Skyler Skyler is 5 years older than Valley who is 16 years

BigorU [14]

Answer:

valley is 16

skyler is 21

lindsay is 29

hope this helps!

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3 years ago

What is 16.2 simplified (and 121 simplified to)

Cerrena [4.2K]

Answer:

16.2 = $\frac{81}{5}$ and 121 = $\frac{121}{1}$

Step-by-step explanation:

16.2 can be simplified to its fraction form, which is $\frac{81}{5}$

$16+\frac{2}{10} =\frac{81}{5}$ which is 16.2

121 is already simplified since it is a whole number, but its fraction form would be $\frac{121}{1}$

$121+\frac{0}{10} =121$ which is 121

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<em>(I hope this helped & good luck! <3)</em>

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3 years ago

Please help me with this math problem!!!!!

vagabundo [1.1K]

Answer:

Step-by-step explanation:

$\cos ~A=0.5=cos~60 \\A=60^\circ\\B=180-A=180-60=120\\\angle~B=120^\circ$

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3 years ago

Lori had $126.89 in her bank account. She deposited $21.49 into it and then wrote a check for her car repairs for $156.61.

kompoz [17]

Answer:

-8.23

Step-by-step explanation:

If Lori had $126.89 in her bank account and she deposited $21.49, she would be adding that to the amount of money in her bank account.

126.89+21.59= 148.48

Then subtract the amount of money the repairs costed.

148.48 - 156.61 = -8.23

Therefore Lori would have a balance of -$8.23.

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3 years ago

In the United States nearly 8 x 10^9 text messages are sent everymonth About how many text messages is this! Find the primefacto

iris [78.8K]

$8\times10^9=2^{12}\times5^9$

1) Since in the USA 8 x 10 ^9 messages are sent every month, that means that approximately 8 billion messages are sent.

2) We can Prime factorize it:

Note that on the right side we've picked only prime numbers. In this case, 2 and 5.

So we can rewrite 8 x 10^9 as prime factors.

$8\times10^9=2^{12}\times5^9$

3) Hence, the answer is:

$8\times10^9=2^{12}\times5^9$

7 0

1 year ago