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2 years ago

PLZZZZZZZZZ HELP!!!!!!!!!!

Mathematics

2 answers:

horrorfan [7]2 years ago

8 0

Answer:

lolzz i just got that question. it's A

Step-by-step explanation:

hope ya have a good day

Marina CMI [18]2 years ago

7 0

Answer:

it’s A

Step-by-step explanation:

i took it on flocabulary

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2 balls can complete a full rotation in 120 min. How many balls can complete a full rotation in 180 min

riadik2000 [5.3K]

Its 3, because each ball is 60 min each and 60 times 3 would get you 180

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3 years ago

Work out the volume of the shape

pashok25 [27]

Answer:

$\large\boxed{V=\dfrac{1,421\pi}{3}\ cm^3}$

Step-by-step explanation:

We have the cone and the half-sphere.

The formula of a volume of a cone:

$V_c=\dfrac{1}{3}\pi r^2H$

r - radius

H - height

We have r = 7cm and H = (22-7)cm=15cm. Substitute:

$V_c=\dfrac{1}{3}\pi(7^2)(15)=\dfrac{1}{3}\pi(49)(15)=\dfrac{735\pi}{3}\ cm^3$

The formula of a volume of a sphere:

$V_s=\dfrac{4}{3}\pi R^3$

R - radius

Therefore the formula of a volume of a half-sphere:

$V_{hs}=\dfrac{1}{2}\cdot\dfrac{4}{3}\pi R^3=\dfrac{2}{3}\pi R^3$

We have R = 7cm. Substitute:

$V_{hs}=\dfrac{2}{3}\pi(7^3)=\dfrac{2}{3}\pi(343)=\dfrac{686\pi}{3}\ cm^3$

The volume of the given shape:

$V=V_c+V_{hs}$

Substitute:

$V=\dfrac{735\pi}{3}+\dfrac{686\pi}{3}=\dfrac{1,421\pi}{3}\ cm^3$

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2 years ago

What is the graph of the equation 9x^2 + 4y^2 - 18x + 8y - 23 = 0 ? Also, how did you get that?

Dmitriy789 [7]

13xy^2-10xy-23=0

you first add the like terms and rewrite and thats how you get the answer

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2 years ago

Pls help ratios and proportions

kifflom [539]

Answer: See explanation

Step-by-step explanation:

3.) Boys║5║10 ║60

Girls ║7║ 14 ║84

7 × 2 = 14

5 × 2 = 10

5 × 12 = 60

7 × 12 = 84

Hope I helped!

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2 years ago

At a restaurant, your bill has a food total of $45.50. Find the amount of an 18% tip on the food total.

oksano4ka [1.4K]

$53.69

45.50+8.19 (45.50 times 18%)=$53.69

8 0

2 years ago

Read 2 more answers