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3 years ago

How do you do this?

Mathematics

1 answer:

nikitadnepr [17]3 years ago

5 0

You multiply 60*30 to get 180. Then, add it to 60 to 240 m.

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Find the area of a rectangle that has a length of 12 m and a width of 7 m

NemiM [27]

You take the length times the width to get the area.

3 0

4 years ago

Read 2 more answers

Y=9x+7,y=3x-11 i need to solve theeqayions by substition and show the work

djyliett [7]

Times the second equation by 2 to get y=9x-33 and then subtract

4 0

3 years ago

Which is the equation of the line that has a slope of 3 and goes through the point (-3,-5)

xeze [42]

y = mx + b

-5 = 3(-3) + b

-5 = -9 + b

4 = b

y = 3x + 4

Hope this helps! ;)

4 0

3 years ago

Let n1=50, X1=10, n2=50, and X2=30. Complete parts (a) and (b) below. a. At the 0.10 level of significance, is there evide

iren2701 [21]

Answer:

|Z| = |-4.089| > 1.645 at 0.10 level of significance

Null hypothesis is rejected at 0.10 level of significance

There is a difference between the two Population proportions

Step-by-step explanation:

Step(i):-

Given first sample size (n₁) = 50

Given proportion of the first sample p⁻₁= 0.2

Given second sample size (n₂) = 50

Given proportion of the second sample p₂⁻ = 30/50 = 0.6

Null Hypothesis : H₀: p₁⁻=p₂⁻

Alternative Hypothesis : H₁: p₁⁻≠p₂⁻

Step(ii):-

Z-statistic

$Z = \frac{p_{1} -p_{2} }{\sqrt{pq(\frac{1}{n_{1} } +\frac{1}{n_{2}) } } }$

Where

$P = \frac{n_{1}p_{1} +n_{2} p_{2} }{n_{1} +n_{2} }$

$P = \frac{50X0.2+50X0.6}{50+50} = 0.4$

Z-statistic

$Z = \frac{0.2-0.6}{\sqrt{0.4 X 0.6(\frac{1}{50}+\frac{1}{50} } }$

Z = -4.089

Level of significance =0.10

Z₀.₁₀ = 1.645

|Z| = |-4.089| > 1.645 at 0.10 level of significance

Null hypothesis is rejected at 0.10 level of significance

Final answer:-

There is a difference between the two Population proportions

3 0

3 years ago

Alicia has 32 stickers. This is 4 times as many stickers as Benita has. How many stickers does Benita have?

strojnjashka [21]

Let's name the number of stickers Alicia has "a" and Benita as "b".

Then: a=32

a=4*b

We know this from the information above. Now we put it together:

32=4*b

we divide both sides by 4:

8=b

Benita has 8 stickers.

8 0

3 years ago