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pantera1 [17]
3 years ago
6

A teacher says that the top 14​% of the class received an A on the last test. The scores were normally distributed with mean 70

and standard deviation 12. Find the minimum score required to get an A.
Mathematics
1 answer:
aleksandrvk [35]3 years ago
4 0

Answer: The minimum score would be 83.08.

Step-by-step explanation:

Since we have given that

Mean = 70

Standard deviation = 12

Top 14%  of the class received an A on last test.

So, right tail of (100-14=86%) = 1.09

So, the minimum score required to get an A is given by

x=z\times s+\mu\\\\x=1.09\times 12+70\\\\x=13.08+70\\\\x=83.08

Hence, the minimum score would be 83.08.

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Find the inverse of each given functions.<br> f(x) = 4x − 12
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Answer:

y=1/4x+3

Step-by-step explanation:

To find the inverse, switch x and y or f(x)

f(x)=4x-12

y=4x-12

x=4y-12

Add 12 to both sides

x+12=4y-12+12

x+12=4y

Divide both sides by 4

x+12/4=y

1/4x+12/4=y

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Answer:

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Explanation:

Equation 2's actual answer is -8, and Equation 4's actual answer is positive 7.

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2 years ago
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In a 45-45-90 right triangle, what is the ratio of the length of one leg to the
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3 years ago
Carrie borrowed $960 in interest free to pay for a car repair. She will pay $120 monthly until the loan is paid off. How many mo
astraxan [27]

Answer:

It will take Carrie 8 months to pay off the loan

Step-by-step explanation:

Step 1: Determine the expression for total amount to be paid

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In our case;

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m= $120

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replacing;

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6 0
3 years ago
What is standard form?
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Hey there! :)

When teachers ask you for the standard form in math, they are asking you to find the simplest form an equation with variables can be in.

Ax + By = C

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Subtract 2x from both sides.

-2x + y = -3 —> standard form.

Hope this helped! :)

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