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3 years ago

50 POINTS

Mathematics

2 answers:

gladu [14]3 years ago

3 0

B
C
D
I'm not totally sure these are correct but I hope they are.I tried my very best and I hope you get more sleep.

zhuklara [117]3 years ago

3 0

Well the first one is B,30.

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Calculate the volume of the cylinder, where a = 18 and b = 11. Use 3.14 for pi and round your answer to the nearest tenth.

cupoosta [38]

Answer:

Volume of cylinder $=2797.7$

Step-by-step explanation:

Let $a$ be diameter and $b$ the height of the cylinder

$Then\ radius(r)=\frac{diamater\ (a)}{2}\\\\r=\frac{18}{2}\\\\r=9$

Volume of cylinder $=\pi\times(radius)^2\times(height)$

$=\pi\times(9)^2\times11\ \ \ \ \ \ (\pi=3.14)\\\\=3.14\times9\times9\times11\\\\=2797.74\\\\\approx2797.7$

6 0

3 years ago

Find the value of x<br> PIC IS BELOW

maks197457 [2]

: $\implies$ $\sf 3x = 27⁰$

: $\implies$ $\sf x = \dfrac{27}{3}$

: $\implies$ $\sf x = 9$

c.) x = 9⁰, angle measure is 27⁰

5 0

3 years ago

Which is the sum of the interior angles of an octagon?

cupoosta [38]

To find the sum of interior angles, subtract 2 by the number of sides and then multiply the difference by 180.

180 (8-2) = 180(6) = 1080.

1080 is the sum of the interior angles of an octagon

Hope this helps :)

5 0

4 years ago

Bill drove 469 miles in 7 hours. At the same rate, how long would it take him to drive 871 miles?

salantis [7]

469 871
------ = ---------
7 x

469x = 7(871)
469x = 6097
x = 6097/469
x = 13 hours

hope this helps :)

3 0

4 years ago

Read 2 more answers

Product is -8 and sum is 2.<br> What are the two numbers

anygoal [31]

Step-by-step explanation:

Let the two numbers be x and y.

$\therefore \: xy = - 8...(1) \\ and \\ x + y = 2 \\ \\ \therefore \:x = 2 - y...(2)$

From equations (1) & (2)

$(2-y)y=-8\\\therefore \: 2y - y^2 = - 8\\\\\therefore \:y^2 - 2y-8=0\\\\\therefore \:y^2 - 4y+2y-8=0\\\\\therefore \:y(y - 4)+2(y-4)=0\\\\\therefore \:(y+2)(y - 4)=0\\\\\therefore \:(y+2)=0\:\: or\:\:(y - 4)=0\\\\\therefore \:y=-2\:\: or\:\:y =4\\\\ When \:\: y = - 2\implies x = 4\\\\When \:\: y = 4\implies x = - 2\\$

Thus, the two numbers are (4, - 2) or (-2, 4).

6 0

4 years ago