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3 years ago

15

Need help asap

1 answer:

harina [27]3 years ago

4 0

Answer:

2 hours, 9 minutes (and 19 seconds if u wanna be exact)

Step-by-step explanation:

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Solve and check 5r-10+2r=10+7r

Law Incorporation [45]

Isolate the variable r.
5r-10+2r=10+7r
7r=20+7r.
There is no solution, because if you subtract 7r from both sides the variable will disappear.

4 0

3 years ago

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Yall i need some help plz

bonufazy [111]

That is hard. I'm guessing that they still are the same shapes but they all have different lengths in certain areas that make them seem like they are the same shapes but are being seen at different angles but I can't be sure. That's why they are in the same groups although having different angles. Does it have answer choices? I will help you if it does...

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3 years ago

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Marissa dug three fifths of a hole in one tenth of an hour. Find the rate<br> in holes per hour

snow_lady [41]

Answer:

Step-by-step explanation:

This might be easier to do in decimals. Let's try it.

3/5 = 0.6

1/10 = 0.1

rate = holes / hours

rate = 0.6/0.1

rate = 6 holes per hour

Try it with fractions.

rate = $\frac{\frac{3}{5} }{\frac{1}{10} }$ Invert and multiply the 1/10

rate = $\frac{3}{5} *\frac{10}{1}$ = 30/5 = 6

It's the same answer. Pick the method that you feel most comfortable with.

3 0

3 years ago

Please help i beg i never get these right

Anuta_ua [19.1K]

Answer:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

Step-by-step explanation:

Given

$\sin(105^o)$

Required

Solve

Using sine rule, we have:

$\sin(A + B) = \sin(A)\cos(B) + \sin(B)\cos(A)$

This gives:

$\sin(105^o) = \sin(60 + 45)$

So, we have:

$\sin(60 + 45) = \sin(60)\cos(45) + \sin(45)\cos(60)$

In radical forms, we have:

$\sin(60 + 45) = \frac{\sqrt 3}{2} * \frac{\sqrt 2}{2} + \frac{\sqrt 2}{2} * \frac{1}{2}$

$\sin(60 + 45) = \frac{\sqrt 6}{4} + \frac{\sqrt 2}{4}$

Take LCM

$\sin(60 + 45) = \frac{\sqrt 6 + \sqrt 2}{4}$

Rewrite as:

$\sin(60 + 45) = \frac{\sqrt 2 + \sqrt 6}{4}$

Hence:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

3 0

3 years ago

A number divided by 3 plus ten equal 15

omeli [17]

Answer:

n/3+10=15

Step-by-step explanation:

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3 years ago

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