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2 years ago

Sarah bought a TV for $250. Three years later she sold it for $180. Work out her percentage loss.

Mathematics

1 answer:

Anna71 [15]2 years ago

3 0

70/250 x 100
Answer: 28%

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Solve 3(2x-4)>2(x+4)

DerKrebs [107]

Answer:

x > 5

Step-by-step explanation:

3 ( 2x - 4 ) > 2 ( x + 4 )

6x - 12 > 2x + 8

4x > 20

x > 5

6 0

2 years ago

A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba

Ahat [919]

Answer:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

Step-by-step explanation:

Information provided

n=100 represent the random sample taken

X=21 represent the number of bags overfilled

$\hat p=\frac{21}{100}=0.21$ estimated proportion of overfilled bags

$p_o=0.15$ is the value that we want to test

z would represent the statistic

Hypothesis

We need to conduct a hypothesis in order to test if the true proportion of overfilled bags is higher than 0.15.:

Null hypothesis: $p =0.7$

Alternative hypothesis: $p > 0.15$

The statistic for this case is:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

And replacing the info given we got:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

5 0

3 years ago

I need help again if I don't get this right then I'll have to do the lesson all over again and i'm already 10 lessons behind!

zhuklara [117]

Answer:

1/27 in ^3

Step-by-step explanation:

where length - 1/3 inches

width - 1/3 inches

height - 1/3 inches

the formula to find volume is as follows

volume =

numerators should be multiplied by numerators and denominators by denominators

volume =

volume of the cube is 1/27 in.³

7 0

3 years ago

Read 2 more answers

You are in a bike race. When you get to the first checkpoint you are 2/5 of the distance away to the second checkpoint. When you

gizmo_the_mogwai [7]

the answer is 1/4 of a distance away

6 0

2 years ago

Read 2 more answers

Nancy's garden has the dimensions shown 4 1/2 yard<br><br> 3 3/4 yd . She need find the area

Marina86 [1]

Answer:

The area of Nancy's garden is $16\frac{7}{8}\ yd^{2}$

Step-by-step explanation:

I assume that the Nancy's garden is a rectangle shape

To find the area first convert mixed number to an improper fraction

$4\frac{1}{2}\ yd=\frac{4*2+1}{2}=\frac{9}{2}\ yd$

$3\frac{3}{4}\ yd=\frac{3*4+3}{4}=\frac{15}{4}\ yd$

Therefore

The area is equal to

$A=\frac{9}{2}*\frac{15}{4}=\frac{135}{8}\ yd^{2}$

convert to mixed number

$\frac{135}{8}\ yd^{2=\frac{128}{8}+\frac{7}{8}=16\frac{7}{8}\ yd^{2}$

4 0

3 years ago