3 years ago

I really need help with this?

Mathematics

1 answer:

Natasha2012 [34]3 years ago

8 0

Answer:

Step-by-step explanation:

if im wrong please tell me although i did do the problem

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If 5 more than twice a number is equal to 2 less than 3 times the number, what is the number?

Vlada [557]

Answer:

Step-by-step explanation:

The following equation can be derived from the question

Let x = unknown number

5 + 2x = 3x - 2

collect like terms

5 + 2 = 3x - 2x

x = 7

4 0

3 years ago

Which number is between 7.17 x 10^4 and 8.17 x 10^5

xxTIMURxx [149]

Answer:

71701,71702, 71703 etc

Step-by-step explanation:

Given :

$7.17$ × $10^{4}$ and 8.17× $10^{5}$

Now

$7.17$ × $10^{4}$ =71700 and

8.17× $10^{5}$ =817000

There are so many numbers between 71700 and 817000

Like: 71701,71702, 71703 etc

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3 years ago

Air is being pumped into a spherical balloon at a rate of 5 cm^3/min. Determine the rate at which the radius of the balloon is i

Romashka-Z-Leto [24]

0.08 cm/min

Step-by-step explanation:

Given:

$\dfrac{dV}{dt}=5\:\text{cm}^3\text{/min}$

Find $\frac{dr}{dt}$ when diameter D = 20 cm.

We know that the volume of a sphere is given by

$V = \dfrac{4\pi}{3}r^3$

Taking the time derivative of V, we get

$\dfrac{dV}{dt} = 4\pi r^2\dfrac{dr}{dt} = 4\pi\left(\dfrac{D}{2}\right)^2\dfrac{dr}{dt} = \pi D^2\dfrac{dr}{dt}$

Solving for $\frac{dr}{dt}$ , we get

$\dfrac{dr}{dt} = \left(\dfrac{1}{\pi D^2}\right)\dfrac{dV}{dt} = \dfrac{1}{\pi(20\:\text{cm}^2)}(5\:\text{cm}^3\text{/min})$

$\:\:\:\:\:\:\:= 0.08\:\text{cm/min}$

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3 years ago

Between what two integers is 130? 10 and 11 11 and 12 12 and 13 13 and 14

Nostrana [21]

Answer:

13 and 14

Step-by-step explanation:

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3 years ago

What would be the angle between the two perpendicular lines.

Anna007 [38]

Answer:

90 degrees

90 degreesPerpendicular lines are lines that intersect at a right (90 degrees) angle.

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2 years ago