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2 years ago

6(3x+5) and 15x+□+3x A 5

Mathematics

1 answer:

Olenka [21]2 years ago

3 0

Answer:

Step-by-step explanation:

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Write 2 subtraction equations to show how to find 15-7

Mnenie [13.5K]

So 15-7 is 8

Here are some things I did:

10-2 or 28-20

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3 years ago

Write a fraction, a decimal and a percent for: one-sixth

suter [353]

Answer:

fraction:1/6 decimal:0.166666 repeated percent:16.6 repeated

Step-by-step explanation:

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2 years ago

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Dan factored x^2+121 into (x+1-11)

babunello [35]

Answer:

Your question is a little unclear. If you are just trying to factor x² + 121, it's prime. (can't be factored using real numbers).

Step-by-step explanation:

The difference of two squares is a special form. a² - b² = (a+b)(a-b).

But, the sum of two squares is prime. a²+ b² cannot be factored.

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3 years ago

What is the x and y intercepts for 10y=5x-20

Readme [11.4K]

They represent variables

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2 years ago

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The rate of change of the volume of a snowball that is melting is proportional to the surface area of the snowball. Suppose the

Alisiya [41]

Answer:

According to the passage, we have the next equation:

$\frac{dV}{dt} = \frac{4}{3}\pi*3*r^{2}*\frac{dr}{dt} = K*(4\pi*r^{2} )$

where "K" is a proportional constant

Leaving at the end with the next equation:

$\frac{dr}{dt} = K$

Integrating the equation, we have:

$r=K*t+C$

where "C" is a constant

Then, we have the 2 conditions for the problem:

1) t=0 → r=10

Replacing in the equation, we have C = 10

2) t=5 → r=8

Replacing in the equation, we have K = -0.4

Finally, the time which the snowball will be completely melted will be when r = 0. So replacing in the equation

$0=-0.4*t+10$

t = 25 minutes

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2 years ago