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Montano1993 [528]
3 years ago
14

A skateboard ramp forms a 42º angle as shown. Find the value of x.

Mathematics
2 answers:
VladimirAG [237]3 years ago
8 0

Answer:

138° would be the value of x

Step-by-step explanation:

the whole line we are looking at is 180° because it is a straight line, so I subtracted 42 from 180 (180-42) and that gave me 138°

please let me know if this answer is inncorect and i will remove it, good luck!

(if this correct please mark brainliest <3

Firlakuza [10]3 years ago
5 0

Answer:

138/6=23

Step-by-step explanation:

Basic Equation for 180 angle.

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Let the abbreviation PSLT stand for the percent of the gross family income that goes into paying state and local taxes. Suppose
gavmur [86]

Answer:

Number of families that should be surveyed if one wants to be 90% sure of being able to estimate the true mean PSLT within 0.5 is at least 43.

Step-by-step explanation:

We are given that one wants to estimate the mean PSLT for the population of all families in New York City with gross incomes in the range $35.000 to $40.000.

If sigma equals 2.0, we have to find that how many families should be surveyed if one wants to be 90% sure of being able to estimate the true mean PSLT within 0.5.

Here, we will use the concept of Margin of error as the statement "true mean PSLT within 0.5" represents the margin of error we want.

<u></u>

<u>SO, Margin of error formula is given by;</u>

       Margin of error =  Z_(_\frac{\alpha}{2}_ ) \times \frac{\sigma}{\sqrt{n} }

where, \alpha = significance level = 10%

            \sigma = standard deviation = 2.0

            n = number of families

Now, in the z table the critical value of x at 5% ( \frac{0.10}{2} = 0.05 ) level of significance is 1.645.

SO,        Margin of error =  Z_(_\frac{\alpha}{2}_ ) \times \frac{\sigma}{\sqrt{n} }

                          0.5   =  1.645 \times \frac{2}{\sqrt{n} }

                         \sqrt{n} =\frac{2\times 1.645 }{0.5}

                         \sqrt{n} =6.58

                           n  =  6.58^{2}

                               = 43.3 ≈ 43

Therefore, number of families that should be surveyed if one wants to be 90% sure of being able to estimate the true mean PSLT within 0.5 is at least 43.

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3 years ago
Tori uses the greatest common factor and the distributive property to rewrite this sum:
vovikov84 [41]
12(2+7)

12 is the GCF for 24 with 12 x2 =24 and 12 is the GCF for 84 with 12 x7= 84.
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3 years ago
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4-x/5 =x-4/6 please help me with this question
marshall27 [118]

Answer:

answer is 0 meaning there is no solution

Step-by-step explanation:

3 0
2 years ago
Fraction 5\6 x 3\10 what is the answer?
Katarina [22]
15/60 *Simplified Answer: 1/4
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The watering can contained 5 1/2 quarts of water. After all the plants were watered, only 4 cups remained. How many cups of wate
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Answer: 9.5 cups of water

Step-by-step explanation:

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