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Alexeev081 [22]
3 years ago
13

Find the sum or diffrence write your answer in simplest form. wats the estimate

Mathematics
1 answer:
Tpy6a [65]3 years ago
8 0
\frac{5}{6} + \frac{7}{8}

Convert your denominators into a same number..

\frac{20}{24} ~+~  \frac{21}{24} ~=~  \frac{41}{24}

\frac{41}{24} as a mixed number = 1 \frac{17}{24}

Your answer - 1 \frac{17}{24}
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Suppose that, on average, electricians earn approximately μ= $54,000 per year in the united states. Assume that the distribution
11111nata11111 [884]

Answer:

0.15866.

Step-by-step explanation:

We have been given that on average, electricians earn approximately μ= $54,000 per year in the united states. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is σ= $12,000. We are asked to find the probability that the sample mean is greater than $66,000.

First of all, we will find the z-score corresponding to 66,000 using z-score formula.

z=\frac{x-\mu}{\sigma}

z=\frac{66000-54000}{12000}

z=\frac{12000}{12000}

z=1

Now, we need to find the probability that z-score is greater than 1 that is P(z>1).

Upon using formula P(z>A)=1-P(z, we will get:

P(z>1)=1-P(z

Upon using normal distribution table, we will get:

P(z>1)=1-0.84134

P(z>1)=0.15866

Therefore, the probability that the sample mean is greater than $66,000 would be 0.15866 or approximately 15.87\%.

4 0
3 years ago
The value of x is?<br> 84<br> 96<br> 132<br> 264<br> HELPPPP!!!!
Alexandra [31]

The 3 outside angles of a triangle need to equal 360 degrees.

To find X, subtract the 2 outside angles shown from 360.

X = 360 - 130 - 134 = 96

The answer is 96

5 0
3 years ago
Read 2 more answers
How can u tell when a rate is a unit rate
r-ruslan [8.4K]
<span>When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. If you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.</span>

6 0
3 years ago
You’re given two side lengths of 10 centimeters and 8 centimeters. The angle between the sides measures 40°. How many triangles
Marrrta [24]
Why triangles though
4 0
3 years ago
Does 10, 9, and 15 make a right triangle?
postnew [5]

the triangle formed by sides 10, 9 and 15 units can't be a right angled triangle, because they doesn't form the pythagorean triplet, that is the sum of squares of the smaller sides isn't equal to the square of largest side,

sum of squares of smaller sides

=》

10 {}^{2}  + 9 {}^{2}

=》

100 + 81

=》

181

now, square of largest side (hypotenuse)

=》

{15}^{2}

=》

225

they aren't equal, proved

4 0
3 years ago
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