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3 years ago

Need help with 20-23 please. geometry

Mathematics

1 answer:

USPshnik [31]3 years ago

8 0

Answer:

20) 5X3=15 15h

21) 12X15=18 180

22) IDEK

23) IDEK

Step-by-step explanation:

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Need help its due at 7 pm so take your time

s344n2d4d5 [400]

Answer:

141x

Step-by-step explanation:

I just did PEMDAS

3x^2-33x-180

multiplied 3x^2 and got 6x

Subbed 180 by 33 and got 147x

then I subbed 147x by 66x and got 141x

3 0

3 years ago

PLEASE HELP which is a solution to the equation 6 x + y=4

VladimirAG [237]

Its D. x = 2, y = -8
6*2 + (-8) = 12 - 8 = 4

5 0

3 years ago

Assume the random variable x is normally distributed with mean μ = 80 and standard deviation σ = 4. Find the indicated probabili

Schach [20]

Answer:

0.2278

Step-by-step explanation:

z = (x-μ)/σ,

where x is the raw score

μ is the population mean

σ is the population standard deviation

z => 72 - 80/4

= -2

Probability value from Z-Table:

P(x ≤ 72) = P(x = 72) => P(x < 72)

0.02275

Approximately =>0.2278

6 0

3 years ago

How would I find the integral of <img src="https://tex.z-dn.net/?f=%5Cint%5Cfrac%7Btdt%7D%7Bt%5E4%2B2%7D" id="TexFormula1" title

kotegsom [21]

Let $t=\sqrt y$ , so that $t^2=y$ , $t^4=y^2$ , and $\mathrm dt=\dfrac{\mathrm dy}{2\sqrt y}$ . Then

$\displaystyle\int\frac t{t^4+2}\,\mathrm dt=\int\frac{\sqrt y}{2\sqrt y(y^2+2)}\,\mathrm dy=\frac12\int\frac{\mathrm dy}{y^2+2}$

Now let $y=\sqrt2\tan z$ , so that $\mathrm dy=\sqrt2\sec^2z\,\mathrm dz$ . Then

$\displaystyle\frac12\int\frac{\mathrm dy}{y^2+2}=\frac12\int\frac{\sqrt2\sec^2z}{(\sqrt2\tan z)+2}\,\mathrm dz=\frac{\sqrt2}4\int\frac{\sec^2z}{\tan^2z+1}\,\mathrm dz=\frac1{2\sqrt2}\int\mathrm dz=\dfrac1{2\sqrt2}z+C$

Transform back to $y$ to get

$\dfrac1{2\sqrt2}\arctan\left(\dfrac y{\sqrt2}\right)+C$

and again to get back a result in terms of $t$ .

$\dfrac1{2\sqrt2}\arctan\left(\dfrac{t^2}{\sqrt2}\right)+C$

3 0

4 years ago

The sum of 3 times a number and 4 is between -8 and 10. Define a variable, write an inequality, and solve the problem.

Ilya [14]

Understanding:

The sum of 3 times a number (i'll define it as x) and 4 means $3x+4$ is between -8 and 10 which means the value of 3x+4 is less than 10 and greater than -8. With that said, the inequality for that problem would be $-8$ .

Solving the problem:

Now we know that $-8$ , you can solve the problem by subtracting 4 from each side then dividing by 3.

$-8-4$

Final Answer:

$-4$

6 0

3 years ago