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nika2105 [10]
2 years ago
13

What is -1/9 + -5/7​

Mathematics
2 answers:
Lerok [7]2 years ago
8 0

Answer: 52/65

Make the denominator the same fraction and do for both numerator and denominator

Zepler [3.9K]2 years ago
5 0

Answer:

- 52/63

Step-by-step explanation:

- 7/63 + - 45/63 = - 52/63

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Find GCF of 5x^5 and 64x^2
Naddika [18.5K]

Answer:

4121x

Step-by-step explanation:

5x^5 + 64x^2

25x+4096x

4121x

8 0
2 years ago
Which is larger, 7/10 or 3/4?
DIA [1.3K]
3/4 is larger than 7/10.
3 0
3 years ago
Read 2 more answers
John has two jobs. For daytime work at a jewelry store he is paid
djyliett [7]

Given Information:

John's mean monthly commission = μ = $10,000

Standard deviation of monthly commission = σ =  $2,000

Answer:

P(9,000 < X < 11,000) = 0.383\\\\P(9,000 < X < 11,000) = 38.3 \%

The probability that John's commission from the jewelry store is  between $9,000 and $11,000 is 38.3%

Step-by-step explanation:

What is Normal Distribution?

We are given a Normal Distribution, which is a continuous probability distribution and is symmetrical around the mean. The shape of this distribution is like a bell curve and most of the data is clustered around the mean. The area under this bell shaped curve represents the probability.  

We want to find out the probability that John's commission from the jewelry store is  between $9,000 and $11,000?

P(9,000 < X < 11,000) = P( \frac{x - \mu}{\sigma} < Z < \frac{x - \mu}{\sigma} )\\\\P(9,000 < X < 11,000) = P( \frac{9,000 - 10,000}{2,000} < Z < \frac{11,000 - 10,000}{2,000} )\\\\P(9,000 < X < 11,000) = P( \frac{-1,000}{2,000} < Z < \frac{1,000}{2,000} )\\\\P(9,000 < X < 11,000) = P( -0.5 < Z < 0.5 )\\\\P(9,000 < X < 11,000) = P( Z < 0.5 ) - P( Z < -0.5 ) \\\\

The z-score corresponding to 0.50 is 0.6915

The z-score corresponding to -0.50 is 0.3085

P(9,000 < X < 11,000) = 0.6915 - 0.3085 \\\\P(9,000 < X < 11,000) = 0.383\\\\P(9,000 < X < 11,000) = 38.3 \%

Therefore, the probability that John's commission from the jewelry store is  between $9,000 and $11,000 is 38.3%

How to use z-table?

Step 1:

In the z-table, find the two-digit number on the left side corresponding to your z-score. (e.g 1.4, 2.2, 0.5 etc.)

Step 2:

Then look up at the top of z-table to find the remaining decimal point in the range of 0.00 to 0.09. (e.g. if you are looking for 0.50 then go for 0.00 column)

Step 3:

Finally, find the corresponding probability from the z-table at the intersection of step 1 and step 2.

4 0
3 years ago
What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie
svetlana [45]

Answer:

radius = 5 in

Step-by-step explanation:

Using the formula for calculating the area (A) of a circle

A = πr² ( r is the radius )

here A = 78.5, hence

3.14r² = 78.5 ( divide both sides by 3.14 )

r² = \frac{78.5}{3.14} = 25 ( take the square root of both sides )

r = \sqrt{25} = 5


6 0
3 years ago
Read 2 more answers
Rational numbers that are not integers and whole numbers that aren't integers.
Nataly [62]
Whole number can be a integer. rational number can not  be  a integer that is  repeating.
8 0
3 years ago
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