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3 years ago

10

Add. Write your answer in simplest form. 4 6/7 + 3 5/7=____

1 answer:

qaws [65]3 years ago

8 0

First add the fractions.

6/7 + 5/7 = 1 4/7

Then add the whole numbers

4 + 3 = 7

Then add the mixed number to the whole number

7 + 1 4/7 = 8 4/7

Your answer is 8 4/7

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Which is an equation in point-slope form for the lines that passes though the points (-1,4) and (3,-4)

Flauer [41]

I don't know if this is the equation you need. But here it is.

Y - 4 = -2 (x + 1)

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3 years ago

Kathy is baking cakes.if each cake requires 1/12 of a teaspoon of vanilla,and she has 9/12 of a teaspoon, how many cakes can she

Studentka2010 [4]

She can bake 9 cakes

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3 years ago

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Another one..*sigh* helpppp :(((

SVETLANKA909090 [29]

Answer: It is B and C.

Step-by-step explanation:

If you divde the -4 and -5 for choice B, it will become 4/5 since it's an absolute value.

For Choice C, it's also the same but before the fractions were negative and there is a negative sign which means it's also the aboslute value which is 4/5.

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3 years ago

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The Dean of the Business School at State University would like to test the hypothesis that no difference exists between the aver

kolbaska11 [484]

Answer:

Paired samples t- test is appropriate for Dean's hypothesis

Step-by-step explanation:

Given Data :

Student 1 2 3 4 5 6 7 8

Marketing 82 86 74 93 90 76 87 100

Finance 76 91 70 79 96 70 85 81

We are supposed to find the test which is appropriate for Dean's hypothesis

We are given the grades of two different subjects for same student

We perform the paired t test because the final grades for the Marketing and Finance is taken for the same student.

So, Option B is correct

Hence Paired samples t- test is appropriate for Dean's hypothesis

8 0

4 years ago

Suppose x has a distribution with μ = 10 and σ = 9. (a) If a random sample of size n = 43 is drawn, find μx, σ x and P(10 ≤ x ≤

JulsSmile [24]

Answer:

P(10 ≤ x ≤ 12) = 0.4274

Step-by-step explanation:

Population mean = u = 10

Population Standard Deviation = $\sigma$ = 9

Sample size = n = 43

Sample mean( $\mu_{x}$ ) is equal to the population mean. So,

Sample mean = $\mu_{x}$ = 10

Sample standard deviation( $\sigma_{x}$ ) is equal to population standard deviation divided by square root of sample size. So,

Sample standard deviation = $\sigma_{x}$ = $\frac{9}{\sqrt{43}}=1.372$

We have to find the probability that for a random sample of n = 43, the value lies between 10 and 12 i.e. P(10 ≤ x ≤ 12)

P(10 ≤ x ≤ 12) = P(x ≤ 12) - P( x ≤ 10)

We can find P(x ≤ 12 ) and P(x ≤ 10) by converting these values to z scores.

The formula for z score is:

$z=\frac{x-\mu_{x}}{\sigma_{x}}$

For x =12, we get:

$z=\frac{12-10}{1.3725}=1.457$

For x =10, we get:

$z=\frac{10-10}{1.3725}=0$

So,

P(x ≤ 12) - P( x ≤ 10) = P(z ≤ 1.457) - P(z ≤ 0)

From the z table,

P(z ≤ 1.457) = 0.9274

P(z ≤ 0) = 0.5

So,

P(x ≤ 12) - P( x ≤ 10) = P(z ≤ 1.458) - P(z ≤ 0) = 0.9274 - 0.5 = 0.4274

So,

P(10 ≤ x ≤ 12) = P(x ≤ 12) - P( x ≤ 10) = 0.4274

Therefore,

The probability that for a random sample of size 43, the mean lies between 10 and 12 is 0.4274.

8 0

3 years ago