3 years ago

Test Questions

2 answers:

8 0

The answer to this question is D because as you see sir in the other figures the triangle in the left is below the right but in case of d it is on the right one

vova2212 [387]3 years ago

5 0

Sorry I don’t know this question

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Edwina measured the length of this swimming pool by drawing similar triangles as shown. What is the best estimate of p, the leng

Paraphin [41]

Answer:

Option C. $p=33\ ft$

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional

In this problem

Using proportion

$\frac{p}{12}=\frac{22}{8}\\ \\p=12*22/8\\ \\p=33\ ft$

7 0

3 years ago

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Add. (5x - 2y + 7) + (3x + y - 8)

Schach [20]

Answer:

$=8x-y-1$

Step-by-step explanation:

So we have the expression:

$(5x-2y+7)+(3x+y-8)$

Combine like terms:

$=(5x+3x)+(-2y+y)+(7-8)$

Add:

$=8x-y-1$

And we're done!

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3 years ago

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Find the sum of the measures

jarptica [38.1K]

Answer:

720

Step-by-step explanation:

360/6= 60 (outside angles)

180-60=120 (inside angles)

120x6=720 (sum of inside angles)

6 0

2 years ago

243.875 to nearest ten

il63 [147K]

243.875 to the nearest tenth place is 243.9

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3 years ago

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The number of square feet per house are normally distributed with a population standard deviation of 137 square feet and an unkn

pshichka [43]

Answer:

Step-by-step explanation:

Given that X, the number of square feet per house is N(mean, 137)

Sample size = 19

Sample mean x bar =1350 sq ft

Since population std dev is given,

std error of sample = $\frac{137}{\sqrt{19} } \\=31.43$

Since sample size is small, t critical value can be used

df = 18

t value for 80% two tailed = 1.333

Margin of error = ±1.333(std error) = ± $1.333*31.43\\=41.896$

Confidence interval = sample mean ±margin of error

= $1350-41.896,1350+41.896\\=(1308.104,1391.896)$

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3 years ago