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3 years ago

The sum of two numbers is 36 twice the first number minus the second number is 6 find the numbers

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

3 0

Answer:

14, 22

Step-by-step explanation:

x+y = 36

2×x - y = 6

=> x = 36 - y

=> 2×(36 - y) - y = 6

72 - 2y - y = 6

-3y = -66

3y = 66

y = 22

=> x = 36 - 22 = 14

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matrenka [14]

Answer: n = 4

Step-by-step explanation: you combine the like variables which turns it into

(4y - 3)

(4y - 3) is <em>another</em> way of saying ((4 x y) - 3)

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5 0

3 years ago

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Assume that the radius r of a sphere is expanding at a rate of 40 cm/min. The volume of a sphere is V = 4 3 πr3 and its surface

Scrat [10]

Answer:

The rate of change in surface area when r = 20 cm is 20,106.19 cm²/min.

Step-by-step explanation:

The area of a sphere is given by the following formula:

$A = 4\pi r^{2}$

In which A is the area, measured in cm², and r is the radius, measured in cm.

Assume that the radius r of a sphere is expanding at a rate of 40 cm/min.

This means that $\frac{dr}{dt} = 40$

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This is $\frac{dA}{dt}$ when $r = 20$ . So

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Applying implicit differentiation.

We have two variables, A and r, so:

$\frac{dA}{dt} = 8r\pi \frac{dr}{dt}$

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The rate of change in surface area when r = 20 cm is 20,106.19 cm²/min.

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3 years ago

Write an expression for the sum of four consecutive odd integers where 2n +1 represents the smallest odd integer.

7nadin3 [17]

8n+16
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Answer:

$A)~ 2(x+2)=2x+14~(NO)$

$B)~14(x+3)=14x+42~(YES)$

$C)~14(x+5)=14x+70~(NO)$

$D)~7(2x+6)=14x+42~(YES)$

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$So,~ B ~and ~ D ~ are~ your ~ answers$

<h3><u>---------------------------</u></h3><h3><u>hope it helps...</u></h3><h3><u>have a great day!!</u></h3>

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