3 years ago

Which expression are equivalent to 2r+(t+r)

Mathematics

1 answer:

umka21 [38]3 years ago

3 0

Simplified, it is 3r+t.

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PLEASE HELP ASAP LOOK AT PICTURE!!!

Goshia [24]

Answer is a look at y and it is the only answer that makes sense due to increase exponentionally in y while X is in 3a

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2 years ago

Complete the identity. sin4x - cos4x = ?

Katyanochek1 [597]

Since sin(2x)=2sinxcosx, we can plug that in to get sin(4x)=2sin(2x)cos(2x)=2*2sinxcosxcos(2x)=4sinxcosxcos(2x). Since cos(2x) = cos^2x-sin^2x, we plug that in. In addition, cos4x=cos^2(2x)-sin^2(2x). Next, since cos^2x=(1+cos(2x))/2 and sin^2x= (1-cos(2x))/2, we plug those in to end up with 4sinxcosxcos(2x)-((1+cos(2x))/2-(1-cos(2x))/2)
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4 0

4 years ago

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Lillie jogs 1/2 mile in 1/10 hour what is Lilli's rate in miles per hour

Goshia [24]

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3 years ago

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If £21 = 500 rubles, how many £ are in 780 rubles? Give your answer to 2 dp

Aleksandr [31]

Answer:

£32.76

Step-by-step explanation:

21/500=0.042

780x0.042 = 32.76

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3 years ago

A laptop has a listed price of $843.88 before tax if the sales tax rate is 7.25% find the total cost of the laptop with sales ta

Step2247 [10]

Answer:

$905.06 dollars

Step-by-step explanation:

Given the following question:

7.25% of 843.88

In order to find the answer, we use the formula to calculate percentages, then we add that answer to the initial cost of the laptop.

$\frac{p\times c}{100}$
$\frac{7.25\times843.88}{100}=7.25\times843.88=6118.13\div100=61.1813$
$61.1813$
$1 < 5$
$61.18$

<u>Now add:
</u> $843.88+61.18=905.06$
$=905.06$

Which means the laptop after a 7.25% sales tax costs "$905.06 dollars."

Hope this helps.

7 0

2 years ago