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3 years ago

Can someone help find the area of this shape please?

Mathematics

1 answer:

9966 [12]3 years ago

8 0

Answer:

496 CM

IM SO SORRY IF THIS IS WRONG

Step-by-step explanation:

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How do you find the percentage of a number?

Dahasolnce [82]

To find the percentage of a number multiply it by whatever decimal you are using or a fraction that you have to convert into a decimal to find the percent. Example: What is 10% of 25? (.10)(25) = 2.5 so 10% of 25 is 2.5.

4 0

4 years ago

When testing for current in a cable with eight color-coded wires, the author used a meter to test five wires at a time. How man

balu736 [363]

Answer:

56 different tests

Step-by-step explanation:

Given:

Number of wires available (n) = 8

Number of wires taken at a time for testing (r) = 5

In order to find the number of different tests required for every possible pairing of five wires, we need to find the combination rather than their permutation as order of wires doesn't disturb the testing.

So, finding the combination of 5 pairs of wires from a total of 8 wires is given as:

$^nC_r=\frac{n!}{r!(n-r)!}$

Plug in the given values and solve. This gives,

$^8C_5=\frac{8!}{5!(8-5)!}\\\\^8C_5=\frac{8\times 7\times 6\times 5!}{5!\times 3\times2\times1}\\\\^8C_5=56$

Therefore, 56 different tests are required for every possible pairing of five wires.

6 0

3 years ago

What would x equal for these two? 15/24 = x/3 & 7/24 = 3/x Thank you!!!

vesna_86 [32]

The first one you have $\frac{15}{24}$ = $\frac{x}{3}$ . To solve this you would multiply both sides by 3.

$\frac{45}{24}$ =x

Then simplify by dividing the numerator and denominator by 3.

$\frac{15}{8}$ =x (or in a mixed fraction 1 $\frac{7}{8}$ )

The second one you have $\frac{7}{24}$ = $\frac{3}{x}$ . To solve this you would multiply both sides by x.

$\frac{7}{24}$ x=3

Now you would divide both sides by $\frac{7}{24}$ .

x= $\frac{3}{\frac{7}{24}}$

You now then multiply 3 by 24 and then divide by 7.

$\frac{72}{7}$

x= $\frac{72}{7}$ (in a mixed fraction would be 10 $\frac{2}{7}$ )

6 0

3 years ago

Please awnser quickly

lakkis [162]

Answer:

B': (-8,2)

C':(-8,9)

D':(-5,4)

Step-by-step explanation:

If im wrong pls tell me!

7 0

3 years ago

Please solve this proportion with steps (I'm stuck) (9x+6)/18= (20x+4)/3x

guapka [62]

$\frac{9x+6}{18}=\frac{20x+4}{3x}$

Cross multiply. Distribute...
$3x(9x+6)=18(20x+4)\\27x^2+18x=360x+72\\27x^2-342x-72=0\\3x^2-38x-8=0$

OH GOD IT'S A QUADRATIC
(our equation is in ax² + bx + c = 0 form. a=3. b= -38. c= -8.
plug these values into the quadratic formula and simplify.)
$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-(-38)\pm\sqrt{(-38)^2-4(3)(-8)}}{2(3)}=\frac{38\pm\sqrt{1444+96}}6\\\\\sqrt{1444+96}=\sqrt{1540}=\sqrt{4\times345}=2\sqrt{345}\\\\\frac{38\pm2\sqrt{345}}6=\boxed{x=\frac{19\pm\sqrt{345}}3}$

Approximate values for x: -0.20714 or 12.874

7 0

3 years ago

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