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3 years ago

A number increased by 4 is the same as 19 minus 2 times the number

Mathematics

2 answers:

pishuonlain [190]3 years ago

7 0

I think the this is the answer
x+4=19-2x

Lelu [443]3 years ago

5 0

X + 4 = 19 -2x
3x = 15
x=5

5 is the number

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Maria solved the equation -5 1/8n = -9 3/4 . Her answer was n = 1 37/41 . She is fairly confident about her answer, but wants to

aleksandr82 [10.1K]

-5 1/8 would round to -5
-9 3/4 would round to -10
1 37/41 would round to 2

-5(2)=-10

Hope this helped :)

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2 years ago

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MARY is making pillows for her new office. She bought 2 1/2 yards of fabric. Her

storchak [24]

17 / 2.5 = 6.80 a yard

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2 years ago

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yuradex [85]

Answer:

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Step-by-step explanation:

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2 years ago

Please help me with this

horrorfan [7]

Answer:

$\dfrac{4000\pi}{3}$ ft³

Step-by-step explanation:

First, let's figure out how to get the volume of a sphere from its surface area. If r is the radius of our sphere, then

The formula for a sphere's surface area is $A = 4\pi r^2$

The formula for a sphere's volume is $V=\frac{4}{3}\pi r^3$

So to get from area to volume, we have to divide the area by 3 and then multiply it by r. Mathematically:

$V=\frac{A}{3}r$

Before we solve for V though, we need to find the radius of our sphere. Thankfully, we're given the surface area - $400\pi$ ft² - so we can use the area formula to find that radius:

$A=4\pi r^2=400\pi\\r^2=100\\r=10$

And now that we have our radius, we can put it into our volume formula to find

$V=\frac{A}{3} r=\frac{400\pi}{3}(10)=\frac{4000\pi}{3}$ ft³

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3 years ago

Which compound inequality has no solution? x > 2 and 3x ≤ 9 x > 1 and 2x ≤ –2 x > –1 and 4x ≥ –8 x > –2 and 5x ≥ 15

antoniya [11.8K]

Answer:

4x > -8

Step-by-step explanation:

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3 years ago

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