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2 years ago

HELP PLEASE I have no clue what this is

Mathematics

2 answers:

devlian [24]2 years ago

7 0

Answer:

972

Step-by-step explanation:

Kamila [148]2 years ago

4 0

Answer:

Step-by-step explanation:

The volume (V) of a sphere is calculated using the formula

V = $\frac{4}{3}$ πr³ ← r is the radius

here r = 9, so

V = $\frac{4}{3}$ × π × 9³

= $\frac{4}{3}$ × π × 729

= $\frac{4(729)\pi }{3}$ = $\frac{2916\pi }{3}$ = 972 π m³

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4.12 x 2.1= can i get answer and work please

alexdok [17]

Answer:

8.652

Step-by-step explanation:

Ignore the points and multiply, then you see that 4.12 has two decimal places and that 2.1 has one decimal place, when you add them there is three decimal places.

412 x 21 = 8652

4.12 x 2.1 = 8.652

Pls mark me as brainliest!!!!

3 0

2 years ago

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The point (7, 8) is the solution of which of the following systems of equations?

Alex73 [517]

Option 4

Verification:-

$\\ \sf\longmapsto x-7y=-49$

$\\ \sf\longmapsto 7-7(8)=-49$

$\\ \sf\longmapsto 7-56=-49$

$\\ \sf\longmapsto -49=-49$

And

$\\ \sf\longmapsto 10x+9y=142$

$\\ \sf\longmapsto 10(7)+9(8)=142$

$\\ \sf\longmapsto 70+72=142$

$\\ \sf\longmapsto 142+142$

Hence verified

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2 years ago

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Plz, help me with this question!

artcher [175]

Answer:

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3 0

2 years ago

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Please help, I will give brainliest.

Serjik [45]

Answer:

8.8-0.5=8.3 or 8 3/10

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A researcher posts a newspaper advertisement offering 520 in exchange for participation in a short study. The researcher accepts

iVinArrow [24]

Answer:

It's a valid sample because the first five people were selected to participate.

Step-by-step explanation:

True because random people who saw the advertisement responded. By chance, not every person who saw the advertisement answered, therefore it was random, but it would be more random if he decided to reject the second, fourth, sixth, and eighth person, and only the first, third, fifth, seventh, and ninth were chosen.

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2 years ago