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2 years ago

How to Substitute 14 for b and 3 for h in the formula for perimeter of a rectangle.

1 answer:

8 0

b
---------------------
|. |
h |. | h
|. |
---------------------
b

Okay so I did my best to make a rectangle above. If you think about substitution, it pretty much means to replace. Like when your teacher leaves for the day so a sun comes in to replace them for the day. Since we're using 14 and 3 to replace b and h, your equation goes from b+b+h+h to find the perimeter, to 14+14+3+3.

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Explain how you would write 423,090,709,000 in word form

vfiekz [6]

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3 years ago

I need to know what 70% of 120 = ?

malfutka [58]

Question: <span>70% of 120 = ?

Work:

To find what </span><span>70% of 120 is. Do .70 times 120.

.70 x 120 = 84

Final Answer:

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3 years ago

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Answer:

Yes

Step-by-step explanation:

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2 years ago

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Sladkaya [172]

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Calculus 2: I need help with u substitution and intergration by parts. Can someone help me understand the concept?

snow_lady [41]

Computing an integral by substitution is the reverse of the chain rule for computing the derivative. Substitution is intended to rewrite a complicated-looking integral involving the derivative of some component expression as another much simpler integral. For example, if $u=f(x)$ , then $\mathrm du=f'(x)\,\mathrm dx$ and

$\displaystyle\int f(x)f'(x)\,\mathrm dx=\int u\,\mathrm du$

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Integration by parts is the reverse of the product rule for derivatives:

$(f(x)g(x))'=f'(x)g(x)+f(x)g'(x)\implies f(x)g'(x)=(f(x)g(x))'-f'(x)g(x)$

Integrating both sides with respect to $x$ gives

$\displaystyle\int f(x)g'(x)\,\mathrm dx=\int(f(x)g(x))'\,\mathrm dx-\int f'(x)g(x)\,\mathrm dx$

$\displaystyle\int f(x)g'(x)\,\mathrm dx=f(x)g(x)-\int f'(x)g(x)\,\mathrm dx$

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Personally, I think the best way to grasp the idea behind the two methods is to practice. You start to notice patterns to the point where knowing which is the "right" method to use becomes second nature.

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2 years ago