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DanielleElmas [232]
2 years ago
8

Help, I need to know this extension.

Mathematics
1 answer:
Lorico [155]2 years ago
7 0

Answer:

10

Step-by-step explanation:

We know that area is 50km^2 and to find area we know the formula it is Area = base * height, 50 = b*5, so b must be 10

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Help please and thanks! I'll award brainliest if you show your work as well :)
iren2701 [21]

Answer:

6 inches

Step-by-step explanation:

Formula for surface area of a cylinder:

SA=2\pi r^{2} +2\pi rh

Plug in values and solve for the radius:

180\pi =2\pi r^{2} +2\pi r(9)\\

Divide both sides by 2\pi

90=r^{2} +r(9)

Subtract 90 from both sides

0=r^{2} +9r-90

Use the quadratic equation to find the roots

x=(-b±\sqrt{b^2-4ac})*\frac{1}{2a} (sorry for formatting, Brainly doesn't

                                           allow equations with ± in them)

x=\frac{-9+\sqrt{9^2-4*1*90} }{2(1)}        and          x=\frac{-9-\sqrt{9^2-4*1*90} }{2(1)}

x=\frac{(-9+\sqrt{81+360})}{2}          and          x=\frac{(-9-\sqrt{81+360})}{2}

x=\frac{(-9+\sqrt{441})}{2}               and          x=\frac{(-9-\sqrt{441})}{2}

x=\frac{(-9+21)}{2}                   and          x=\frac{(-9-21)}{2}

x=\frac{12}{2}                           and          x=\frac{-30}{2}

x=6                             and          x=-15  

We can't have a negative radius, so that leaves us with r=6 in.

8 0
2 years ago
Read and answer the problem. write your answer in a 12-hour clock and a 24-hour clock.
iren [92.7K]

Answer:

Italy - 6am

Taiwan - 1pm

Peru-12am

Turkey-8am

Laos-12pm

Step-by-step explanation:

7 0
3 years ago
Use the explicit formula an = a1 + (n - 1) • d to find the 350th term of the sequence below. 57, 66, 75, 84, 93, ... A. 3234 B.
mylen [45]
To use the equation we need a1 and d(the common difference).
We have a1 = 57, we need to find d.
93-84 = 9; 84-75=9; 75-66=9; 66-57=9
d = 9
a350 = 57 + (350-1)(9)
a350 = 57 + (349)(9)
a350 = 57 + 3141
a350 = 3198
4 0
3 years ago
Read 2 more answers
Plzzzzzz helppppp asappppp <br> ***will mark brainliest *****
Vanyuwa [196]

i am not sure but it think its 6 root 2

6 0
3 years ago
If x=-3, then the solution of the equation 2x+6 is ?
Vlada [557]

Hello!

if x = -3, just substitute it for x (replace the x with -3)

2(-3) + 6 = 0

2 * -3 = -6

-6 + 6 = 0

I hope this helps, and have a nice day!

6 0
3 years ago
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