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2 years ago

Glen Cove has a population of 7,200, which is decreasing at a

Mathematics

1 answer:

slamgirl [31]2 years ago

4 0

Answer:

11 years

Step-by-step explanation:

7200 - 80x = 5000 + 120x
-5000 + 80x -5000 + 80x
2200 = 200x
11 = x

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Which formula shows a joint variation?

djyliett [7]

The answer is the first option: I, II and III.

The explanation is shown below:

1. By definition, there is a joint variation when a variable depends on two or more different variables. Therefore, you can express it as following:

$y=kxz$

Where $x,y$ and $z$ are the variables and $k$ is the constant of proportionality.

As you can see, $y$ is directly proportional to $x$ and $z$ .

2. Keeping the information above, you have:

I) $V=lwh$ ( $V$ varies jointly with $l$ , $w$ and $h$ .

II) $V=\frac{1}{3}r^{2}h\pi$ (If $\frac{\pi}{3}$ is the constant of proportionality, $V$ varies jointly with $r^{2}$ and $h$ ).

III) $V=Bh$ ( $V$ varies jointly with $B$ and $h$ .

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4 years ago

Read 2 more answers

Numbers 7. 9 and 11.

Kay [80]

Answer:

7. Closed circle with the line going left (put dot on 8)

9. Closed circle on -9 with the line going right

11. Open circle on -4 1/2 with the line going left

Step-by-step explanation:

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2 years ago

How do you write y=-6/5x-7/5 in standard form

Anvisha [2.4K]

Y=-6/5x-7/5
You add it and move it to the other side
y+6/5x=-7/5
Multiply both sides by 5
5y+6x=-7
Rearrange
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3 years ago

Find the slope of every line that is perpendicular<br> to this one

ArbitrLikvidat [17]

Answer:

Step-by-step explanation:

The slope of this line is -1 or -1/1, and to find the perpendicular slope you find the opposite of the reciprocal, which in this case would be 1/1 which simplifies to 1.

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3 years ago

PLEASE HELP FOR 5 STAR AND BRAINLIST TYSM

victus00 [196]

Answer:

Step-by-step explanation:

1) 792÷ 36=22

2) 1/2 ÷ 3 = 1/6

3) D

4) its 10,00 cause 7.741 x 10 = 77,410

5) the answer in decimal is 60.089

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3 years ago