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GenaCL600 [577]
3 years ago
13

The U.S. Census Bureau conducts a study to determine the time needed to complete the shortform. The Bureau surveys 200 people. T

he sample mean is 8.2 minutes. There is a knownstandard deviation of 2.2 minutes. The population distribution is assumed to be normal.Identify the following:x¯= _____σ= _____n= _____
Mathematics
1 answer:
pychu [463]3 years ago
8 0

Answer:

Step-by-step explanation:

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Work out the number that is halfway between 27 times 38 and 33 times 38.
lutik1710 [3]
27*38=1026\\
33*38=1254\\
x-between\ number\\
x=\frac{1026+1254}{2}\\
x=\frac{2280}{2}\\
x=1140
4 0
3 years ago
Solve the equation with quadratic formula<br> y^2+3y-10=0
neonofarm [45]

Answer:

y = 2 and y = -5

Step-by-step explanation:

Because the coefficient is not greater than 1, you can simply solve the problem without the quadratic formula.

By using the "x" method, you must figure out what multiplies to give you -10, and adds to give you 3

So, you find your values as 5 and -2. You then set these values equal to zero in terms of Y. As so---- (y+5)=0 and (y-2)=0

Then, you solve out to get your answer! Y is equal to -5 and 2

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3 years ago
Hi! I need help on #12 A, and B! Just kinda confused so if u could explain in a simple way that’d be great!
Vinvika [58]

Assume that the bank balance started at zero. Enter the income and outgo in chronological order: $300 - $50 - $75 + $225

Find the sum. This sum will represent the amount left in the account after the $225 deposit:

$250 - $75 + $225, or

$175 + $225 = $400 The final balance will be $400.

5 0
4 years ago
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How many 1/4 cup servings are in 3 cups of pasta?​
4vir4ik [10]

Answer:

12

Explanation:

1/4 × 12 = 3

5 0
3 years ago
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-4.5x(-2) =<br> i need help solving this equation
Mrrafil [7]

Answer:

9x

Step-by-step explanation:

-4.5X(-2)

-4.5x * -2

9x

5 0
3 years ago
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