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Mademuasel [1]
4 years ago
11

-8-x=x - 4x Plis help me!!

Mathematics
2 answers:
jeka944 years ago
7 0

Answer:x=4

Step-by-step explanation:

-8-x=x-4x

-8=-4x+x+x

-8=-2x

divide both sides by -2

x=4

hope it helped

Makovka662 [10]4 years ago
5 0

Answer:

x = 4

Step-by-step explanation:

Given

- 8 - x = x - 4x, that is

- 8 - x = - 3x ( add 3x to both sides )

- 8 + 2x = 0 ( add 8 to both sides )

2x = 8 ( divide both sides by 2 )

x = 4

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ElenaW [278]

Answer:

Is this a question from school or from ur mind

8 0
3 years ago
A pizza place charges for pizzas and adds a delivery fee the cost in dollars to have have any number of pizzas delivered to a ho
zmey [24]
So you just plug in 3 into variable p in the equation. C=12(3)+5
C=26+5
C=31
5 0
4 years ago
A pharmaticeutical company is making a new medicine capsule shaped like a cylinder with a half sphere at each end. The
DerKrebs [107]

Answer:

339.12 cubic millimeters

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The volume of the figure is equal to the volume of the two hemispheres (one sphere) plus the volume of the cylinder

so

step 1

Find the volume of the cylinder

The volume is given by

V=Bh

where

B is the area of the base of cylinder

h is the height of cylinder

we have

B=\pi r^{2}

we have

h=8\ mm

r=6/2=3\ mm ----> the radius is half the diameter

B=(3.14)(3)^{2}

B=28.26\ mm^2

substitute

V=(28.26)(8)=226.08\ mm^3

step 2

Find the volume of the sphere

The volume is given by

V=\frac{4}{3}\pi  r^{3}

we have

r=6/2=3\ mm ----> the radius is half the diameter

substitute

V=\frac{4}{3}(3.14)(3)^{3}=113.04\ mm^3

step 3

Adds the volumes

226.08+113.04=339.12\ mm^3

6 0
3 years ago
Annual starting salaries for college graduates is unknown. Assume that a 95% confidence interval estimate of the population mean
kumpel [21]

Answer:

A sample of 217 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

If the population standard deviation is $3,750 how large should the sample be if margin of error is $500

We have that \sigma = 3750.

We need a sample of n, and n is found when M = 500. So

M = z*\frac{\sigma}{\sqrt{n}}

500 = 1.96*\frac{3750}{\sqrt{n}}

500\sqrt{n} = 1.96*3750

\sqrt{n} = \frac{1.96*3750}{500}

(\sqrt{n})^{2} = (\frac{1.96*3750}{500})^{2}

n = 216.1

Rounding up

A sample of 217 is needed.

4 0
3 years ago
Plz help! Kenneth's back yard is in the shape of a rectangle with a length of 12 yards and a width of 10 yards.A bag of grass se
Zolol [24]
First, we have to work out the area of the backyard using the formula base times height
a=12*10. So, the area of the yard is 120.
Then, we have to work out how much grass seed we need, so we put all values in a ratio
120=x
400=25.99
The, you ask yourself what do I have to divide by 120 to get 400 ( and you do this by dividing 120/400 which is 0.3)
The, you also multiply 25.99 by 0.3 to find out how much grass seed you need.
So, to cover an area of 120yd^2, you need $7.80 worth of grass seed
8 0
4 years ago
Read 2 more answers
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