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adoni [48]
3 years ago
15

Look closely at the model.

Mathematics
1 answer:
Maslowich3 years ago
6 0

Answer:

Perimeter: 2(x+3) + 2(x+2)

Step-by-step explanation:

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Plz help i need to find slope here
Aleksandr-060686 [28]
The answer is d which is 6/5
3 0
3 years ago
The distribution of income tax refunds follow an approximate normal distribution with a mean of $7010 and a standard deviation o
Andrej [43]

Answer:

A refund must be above $7,139 before it is audited.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 7010, standard deviation = 43.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

The empirical rule is symmetric, which means that the lowest (100-99.7)/2 = 0.15% is at least 3 standard deviations below the mean, and the upper 0.15% is at least 3 standard deviations above the mean.

Use the Empirical Rule to determine approximately above what dollar value must a refund be before it is audited.

3 standard deviations above the mean, so:

7010 + 3*43 = 7139.

A refund must be above $7,139 before it is audited.

5 0
3 years ago
Rationalize the denominator and simplify. √a+1 - 2 / √a+1 + 2
goldfiish [28.3K]

Answer:

5+a-4√a+1 / a-3

3 0
3 years ago
Solve for x and y: x+y=5 x−y=a
9966 [12]

Answer:

x=5/2 + a/2,  y= 5/2 - a/2

Step-by-step explanation:

We can solve this system using addition of the equations

x+y=5

<u>x-y=a</u>

2x  =(5+a)

x=(5+a)/2= 5/2 +a/2

x=5/2 +a/2

x-y=a

y = x - a , x=5/2 + a/2

y= 5/2 + a/2-a

y= 5/2 - a/2

5 0
3 years ago
Which expression could be used to evaluate the expression below?
svetoff [14.1K]

Answer:

D. 4 x -2 - 7/8

Step-by-step explanation:

4 x -2 7/8

2 7/8 can be separated into 2 pieces 2 +7/8

4x - (2+7/8)

Distribute the minus sign

4x - 2 -7/8

5 0
3 years ago
Read 2 more answers
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