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USPshnik [31]
2 years ago
11

SOMEONE HELP ME PLEASE

Mathematics
2 answers:
lawyer [7]2 years ago
8 0

Answer:

y = 90

Step-by-step explanation:

You can use proportions to answer this question.

\frac{30}{-3} =\frac{y}{-9}

Cross multiply 30 to -9; -3 to y

-270=-3y

Isolate <em>y</em> by dividing -3 on both sides

y=90

Darya [45]2 years ago
6 0

Answer:

90

Step-by-step explanation:

30/-3 = ?/-9

Cross Multiply-

30 × -9 = -270

-3 × ? = -3

-270 ÷ -3 = 90

y = 90

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(-3, 4)

Step-by-step explanation:

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3 years ago
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Answer:

The answer is option 2.

Step-by-step explanation:

Firstly, you must factorize the possible expressions :

\frac{ {x}^{2} - 2x - 15 }{x - 3}  \div  \frac{x - 5}{ {x}^{2} - 9 }

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Next you have to divide by converting to multiplication :

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Lastly, you can cut out the similar expressions :

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7 0
3 years ago
What is the volume of a cone that has a height of 7 mm and a radius of 3 mm?
vaieri [72.5K]
<span>So we want to know the volume V of a cone with a height h=7 mm and of radius r=3 mm rounded to the nearest hundreth. We need the formula for the volume of a cone: V=(1/3)*pi*r^2*h. Now we simply input the numbers and get: V=65.94 mm^2 and that is rounded to the first hundreth.</span>
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2 years ago
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defon

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Step-by-step explanation:

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