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4 years ago

Use addition to solve the linear system of equations. Show all of your work.

Mathematics

2 answers:

Marysya12 [62]4 years ago

6 0

You're looking for the answers to both X and Y, correct?

alexgriva [62]4 years ago

3 0

I changed the first equation to y=x-3 by subtracting 3 from each side.

y=x-3
y=-4x-3

So, x-3 = -4x-3, because y =y.

So, I then solved for x, and used this number to solve for y.

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The total surface area of a hemisphere is 45 <img src="https://tex.z-dn.net/?f=%5Cpi%5Cp" id="TexFormula1" title="\pi\p" alt=

rjkz [21]

Answer:

The volume of the hemisphere

V = 121.33086 cubic centimeter

Step-by-step explanation:

Step(i):-

Given that the total surface area of a hemisphere = 45π cm²

The total surface area of a hemisphere = 3π r²

Equating

3π r² = 45π

$r^{2} = \frac{45}{3} =15$

r = $\sqrt{15} = 3.87$

The radius of the sphere 'r' = 3.87

Step(ii):-

The volume of the hemisphere

$V = \frac{2}{3} \pi r^{3}$

$V = \frac{2}{3} \pi (3.87)^{3}$

we know that π = 3.14

$V = \frac{2}{3} (3.14) (3.87)^{3}$

V = 121.33086 cubic centimeter

7 0

3 years ago

Bao buys a skateboard that originally cost $38. He uses a coupon to save 20% after sales tax. The sales tax rate is 6.25%. How m

il63 [147K]

Answer:

I believe its 4.75

Step-by-step explanation:

Im sorry if I got it wrong.

5 0

3 years ago

If 15 baseballs weigh 75 ounces how many baseballs weigh 15 ounces

iogann1982 [59]

The answer is 3 Baseballs. This is true because 75 ounces distributed into 15 baseballs is 5 so to get 15 ounces you will need 3 Baseballs.

3 0

3 years ago

Read 2 more answers

A bag of flour weighs 4 1/5 kilograms, what would be the weight of 2 1/2 bags?

lord [1]

Answer:

21/2 or 10.5

Step-by-step explanation:

5 0

3 years ago

A fishbowl shaped like a sphere is filled with water the fishbowl has a diameter of 16 inches which measurement is closest to th

Nikolay [14]

Answer:

The volume = 2143.573 cubic inches

Step-by-step explanation:

∵ The volume of the sphere = $\frac{4}{3}\pi r^{3}$

∵ The diameter of the sphere is 16 inches

∴ Its radius = 16 ÷ 2 = 8 inches

∵ The fishbowl is filled

∴ The volume of the water = the volume of the fishbowl

∴ The volume of the water = $\frac{4}{3}\pi(8^{3})=2143.573$ cubic inches

8 0

3 years ago

Read 2 more answers