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s344n2d4d5 [400]
3 years ago
9

Help me please I need an an answer asap

Mathematics
1 answer:
storchak [24]3 years ago
4 0
5A + 7 = 3A + 7 + 2A
We need to solve for A.

3A + 7 + 2A = 3A + 2A + 7 = 5A + 7 (We can add 3A and 2A because it's the same variable, so we add the coefficients)

5A + 7 = 3A + 7 + 2A
5A + 7 = 5A + 7

5A + 7 is always equal to 5A + 7 because it's the same equation. So the equation got infinitely many solutions.
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Suppose speeds of vehicles traveling on a highway have an unknown distribution with mean 63 and standard deviation 4 miles per h
Mashutka [201]

Answer:

The standard deviation for the sample mean distribution=0.603

Step-by-step explanation:

We are given that

Mean,\mu=63

Standard deviation,\sigma=4

n=44

We have to find the standard deviation for the sample mean distribution using  Central Limit Theorem for Means.

Standard deviation for the sample mean distribution

\sigma_x=\frac{\sigma}{\sqrt{n}}

Using the formula

\sigma_x=\frac{4}{\sqrt{44}}

\sigma_x=\frac{4}{\sqrt{2\times 2\times 11}}

\sigma_x=\frac{4}{2\sqrt{11}}

\sigma_x=\frac{2}{\sqrt{11}}

\sigma_x=0.603

Hence, the standard deviation for the sample mean distribution=0.603

6 0
2 years ago
During a recent rainstorm, 8 centimeters of rain fell in Dubaku's hometown, and 2.362, points, 36 centimeters of rain fell in El
kolezko [41]

Answer:

Hence, 5.64 centimeters of more rain fell in Dubaku's town than in Elliot's town.

Step-by-step explanation:

The amount of rain that fell in Dubaku's hometown is: 8 centimeters.

Amount of rain that fell in Elliot's hometown is: 2.36 centimeters.

We are asked to find how much more rain fell in Dubaku's town than in Elliot's town so it is calculated as the difference between the rain in both of there towns and is given by:

Difference in rain= 8-2.36

Difference in rain= 5.64 centimeters.

7 0
2 years ago
What is the sales tax rate?
Allisa [31]
Hello there! We are solving for the tax rate, so let's start off by subtracting both prices. 4.32 - 4.00 is 0.32. That's a 32 cent difference in the price. Now, let's divide that number by the original price to find the percentage. 0.32/4 is 0.08. Multiply that number by 100 and that is 8%. There. The sales tax rate is 8%.

8 0
3 years ago
Leah predicts that she will need to contribute $7,000 per year for college tuition and already has $4,000 in savings. She is beg
Sveta_85 [38]

Answer:

125 Dollars

Step-by-step explanation:

Total fee = 7000

Amount in hand = 4000

Amount to be saved in 2 years = 7000 - 4000 = 3000

No of months in 2 years = 12 x 2 = 24

Per month saving = 3000 / 24 = 125 $

4 0
3 years ago
Can someone please help me am failing
Elena-2011 [213]
Part A: W= Wage (money earned)
$6 (earned per hour without working overtime)     Equation: W=$6x
x= number of hours

S= (money earned)
$6 plus $9 (earned per hour with working overtime) Equation S=$15y
y= hours

Part C: Use S=$15y   (this shows the amount of money earned after working overtime after the certain amount of hours spent)

$330=$15y

I think you can solve from there

7 0
3 years ago
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