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3 years ago

What is the area of a triangle with sides 8 and 10 cm long

Mathematics

2 answers:

7nadin3 [17]3 years ago

7 0

Answer:

40 cm

Step-by-step explanation:

Can I have brainliest?

kati45 [8]3 years ago

5 0

Answer:

40cm²

Step-by-step explanation:

To solve this, you need to use the formula:

Area = (base x height) ÷ 2

So,

Area = (8 x 10) ÷ 2

Area = 80 ÷ 2

Area = 40cm²

Hope this helps! :)

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What is 39/2 simplified

dsp73

Answer: 19.5 is the answer

Step-by-step explanation: 39 divided by 2 is 19.5

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3 years ago

Read 2 more answers

73 times ? equals 0

ad-work [718]

Answer:

Step-by-step explanation:

73x=0

Let's allow ?=x because we need an unknown number.

x=0/73=0

x=0

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3 years ago

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3 years ago

Calculus 2 Master needed, evaluate the indefinite integral of: <img src="https://tex.z-dn.net/?f=%5Cint%5C%28%20%28lnx%29%5E2%7D

viva [34]

Answer:

$\int (\ln(x))^2dx=x(\ln(x)^2-2\ln(x)+2)+C$

Step-by-step explanation:

So we have the indefinite integral:

$\int (\ln(x))^2dx$

This is the same thing as:

$=\int 1\cdot (\ln(x))^2dx$

So, let's do integration by parts.

Let u be (ln(x))². And let dv be (1)dx. Therefore:

$u=(\ln(x))^2\\\text{Find du. Use the chain rule.}\\\frac{du}{dx}=2(\ln(x))\cdot\frac{1}{x}$

Simplify:

$du=\frac{2\ln(x)}{x}dx$

And:

$dv=(1)dx\\v=x$

Therefore:

$\int (\ln(x))^2dx=x\ln(x)^2-\int(x)(\frac{2\ln(x)}{x})dx$

The x cancel:

$=x\ln(x)^2-\int2\ln(x)dx$

Move the 2 to the front:

$=x\ln(x)^2-2\int\ln(x)dx$

(I'm not exactly sure how you got what you got. Perhaps you differentiated incorrectly?)

Now, let's use integrations by parts again for the integral. Similarly, let's put a 1 in front:

$=x\ln(x)^2-2\int 1\cdot\ln(x)dx$

Let u be ln(x) and let dv be (1)dx. Thus:

$u=\ln(x)\\du=\frac{1}{x}dx$

And:

$dv=(1)dx\\v=x$

So:

$=x\ln(x)^2-2(x\ln(x)-\int (x)\frac{1}{x}dx)$

Simplify the integral:

$=x\ln(x)^2-2(x\ln(x)-\int (1)dx)$

Evaluate:

$=x\ln(x)^2-2(x\ln(x)-x)$

Now, we just have to simplify :)

Distribute the -2:

$=x\ln(x)^2-2x\ln(x)+2x$

And if preferred, we can factor out a x:

$=x(\ln(x)^2-2\ln(x)+2)$

And, of course, don't forget about the constant of integration!

$=x(\ln(x)^2-2\ln(x)+2)+C$

And we are done :)

8 0

3 years ago

There are two numbers, and one is 7 more than twice the other. The sum of the numbers is 43. What are the numbers? If x is less

chubhunter [2.5K]

Answer:

43-7=x

Step-by-step explanation:

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2 years ago