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zhuklara [117]
3 years ago
10

Please help!! What is the value of x?

Mathematics
1 answer:
Alika [10]3 years ago
6 0

Answer:

  42.9

Step-by-step explanation:

The triangles are similar, so corresponding side lengths are proportional.

Consider the left side of the figure:

  MA +AN = MN

  MA = MN -AN = 67.2 -32 = 35.2

Now, we can write the proportion ...

  MB/MP = MA/MN

  x/81.9 = 35.2/67.2 . . . . . .fill in the known values

  x = 81.9(35.2/67.2) . . . . . multiply by 81.9

  x = 42.9

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Liam wants to estimate the percentage of people who lease a car. He surveys 240 individuals and finds that 54 lease a car. Find
scoundrel [369]

Answer:

ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

The confidence interval is 95% and the significance level is \alpha=1-0.95=0.05 and \alpha/2 =0.025 and the critical value would be:

z_{\alpha/2}= 1.96

And the margin of error would be:

ME = 1.96 \sqrt{\frac{0.225 (1-0.225)}{240}}= 0.0528

Step-by-step explanation:

We have the following info given:

n =240 the sample size selected

X=54 the number of people who lease a car

\hat p =\frac{54}{240}= 0.225 the estimated proportion of people who lease a car

The margin of error is given by:

ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

The confidence interval is 95% and the significance level is \alpha=1-0.95=0.05 and \alpha/2 =0.025 and the critical value would be:

z_{\alpha/2}= 1.96

And the margin of error would be:

ME = 1.96 \sqrt{\frac{0.225 (1-0.225)}{240}}= 0.0528

6 0
3 years ago
I need help asap!<br><br> I need help asap! Right answer gets brainlyist
coldgirl [10]

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8 0
3 years ago
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4. John wants to cover a box entirely with silver paper. How many square centimetres
masya89 [10]

Answer:

4.

l=22cm

b:16cm

h:10cm

surface area =2(lb+bh+lh)=2(22*16+16*10+22*10)

=1464cm²

5.

a=2.5dm

area cubical soda cracker box=6a²=6*2.5²=37.5dm²

6.

r=1.5dm

area of ball=4πr²=4π×1.5²=28.27dm² per ball

for 10 bal =28.27×10=282.6dm²

8 0
2 years ago
What is the volume of the solid if a 6 inch (diameter hole is drilled all the way
Tanzania [10]

Answer:

1,467.6 cm³

Step-by-step explanation:

Volume of the solid = volume of the rectangular prism - volume of the cylinder

= L*W*H - πr²h

L = 12

W = 10

H = 16

r = ½(6) = 3

h = 16

Plug in the values

Volume of the solid = 12*10*16 - π*3²*16

= 1,920 - 452.40

= 1,467.6 cm³

5 0
3 years ago
Which of the following represents 2x-5y+15=o written in slope-intercept form? Y=-2/5x+3. Y=2/5x-3. Y=2/5x+3
likoan [24]
The second one is the correct answer.
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