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3 years ago

Could you help me by chance?

Mathematics

1 answer:

gladu [14]3 years ago

5 0

Answer:

27.5

This is because you plug the numbers into the equation. Hope this helps!

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HW #35: similar polygons

Alex73 [517]

Answer:

Q 9:

Because the two polygons are similar so AB ≈ PQ = SR

Scale factor is 25/20 = 1.25

Perimeter of ABCD = 14+20+14+20 = 68

We can find the length of SP by multiplying the scale factor with the AD so

SP = 14 * 1.24= 17.5

Perimeter of PQRS = 17.5+25+17.5+25 = 85

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Q 10:

Because the two polygons are similar so AD ≈. EH

Scale factor is 7/14 = 0.5

Perimeter of ABCD = 12+14+13+26 = 65

Because the two polygons are similar so DC ≈ HG

and our scale factor is 0.5 so HG = 13/2 = 6.5

Perimeter of EFHG = 6 + 7 + 6.5 + 13 = 32.5

----------------------------------------------------------------------------------

Q 11:

The Geometric Mean is a special type of average where we multiply the numbers together and then take a square root (for two numbers). And the formula for finding the Geometric mean of two numbers a and b is

$\sqrt{a*b}$

So geometric mean of the 8 and 10 can be found as

$\sqrt{8*2} = \sqrt{16} = 4$

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Q 12:

Similarly we can using the above formula of finding the geometric mean of 5 and 45 as

$\sqrt{5*45} = \sqrt{225} = 15$

-------------------------------------------------------------------------------

Q 13:

and we can find the geometric mean of 6 and 30 by using the same formula

$\sqrt{6*30} = \sqrt{180} = 13.41$

4 0

3 years ago

Suppose you are thinking about buying one of two cars. Car A will cost $17,655. You can expect to pay an average of $1230 per ye

krek1111 [17]

C. 9 years.
Hopefully this helps

5 0

3 years ago

Does anyone know what the answer?????

Alchen [17]

Answer:

i believe that it is 13

Step-by-step explanation:

when you divide 26 by two you get 13 making it the middle of 0 and 26

4 0

3 years ago

She use 17 1 4 cups of sugar and needs another 7 8 cups for other batch how many cups will she use alltogether

kvasek [131]

What you want to do is find the greatest common denominator, so for now put the 17 to the side and focus on the 1/4 and 7/8, we can find the GCD (greatest common denominator) by multiplying 1/4 • 8/8 = 8/32 And then multiplying 7/8 • 4/4 = 28/ 32 So here we have remaining 17 & 8/32 cups PLUS 28/32 cups, you can add the numerators straight across and keeps the denominators the same, which says that she uses 18 & 4/32
Simplified version: 18 & 1/8

6 0

3 years ago

There are 169 million registered voters in the us. determine an interval for the number (how many) of registered democrats in th

VashaNatasha [74]

Part A:

Given that in a sample of 400 registered voters, 204 were democrats, i.e. n = 400, <span> $\hat{p}= \frac{204}{400} =0.51$

</span>The 95% confidence interval for the proportion of registered democrats voters in the population is given by:

$95\%\ C.I.=\hat{p}\pm z_{\alpha/2}\sqrt{\frac{\hat{p}(1-\hat{p})}{n}} \\ \\ =0.51\pm1.96\sqrt{\frac{0.51(1-0.51)}{400}}=0.51\pm1.96\sqrt{\frac{0.2499}{400}} \\ \\ =0.51\pm1.96(0.025)=0.51\pm0.049=(0.51-0.049,\ 0.51+0.049) \\ \\ =\bold{(0.461,\ 0.559)}$

Part B:

Given that t<span>here are 169 million registered voters in the US, the interval for the number of registered democrats in the population is given by

[0.461(169,000,000), 0.559(169,000,000)] = (77,909,000, 94,471,000)
</span>

6 0

3 years ago