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Alenkinab [10]
4 years ago
9

Evaluate f(x) = 1/4 x for x =-5.

Mathematics
2 answers:
Marianna [84]4 years ago
7 0

Answer:

f(x) = -1.25

Step-by-step explanation:

Substitute x with -5, so our equation would look this:

<em>Note: We were already given the value of x</em>

f(x) = 1/4(-5)

Multiply 1/4 and -5:

1/4 * -5 = -1.25

So, our answer would be -1.25

tester [92]4 years ago
4 0
<h3>Answer:</h3>

-1.25

<h3>Step-by-step explanation:</h3>

In order to find the answer to your question, we're going to need to plug in a number to the variable x.

We know that x = -5

This means that whenever you see x, you would replace it with what it equals to. In this case, we would plug in -5 to x, since that's what it equals to.

Your equation would look like this:

\frac{1}{4}( -5)

Now, you would solve to get your answer.

\frac{1}{4} (-5)=-1.25\\\\\text{1/4 is the same as 0.25} \\\\0.25(-5)=-1.25

Once you're done solving, you should get -1.25

This means that f(x) = -1.25

<h3>I hope this helps you out.</h3><h3>Good luck on your academics.</h3><h3>Have a fantastic day!</h3>
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What the input and output is
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Hello from MrBillDoesMath!

Answer:

Rule: Y  = 5x - 3

Table Line 4: Y (output) = 37

Table Line 5: X (input) = 10

Discussion:

This one had MrBill going for a while!  The rule appears to be

Y =  5 * x - 3

Check it out! Substitute some table values (input) and check the (output) values.

Table line 4: Y(8) = 5 * 8 - 3 = 40 - 3 =  37  (Output)

Table line 5: If Y = 47 = 5*x -3   =>    add 3 to both sides

                               47 + 3= 5x   =>    as 47 +3 = 50

                               50      = 5x   =>    divide both sides by 5

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Thank you,

MrB

8 0
3 years ago
A business student is interested in estimating the 90% confidence interval for the proportion of students who bring laptops to c
Romashka [77]

Answer:

n = 106

Step-by-step explanation:

Given  

p = 0.5 and 1-p = q = 0.5

Margin of error = 0.08  

Confidence level = 90%  

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As we know -  

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Substituting the given value, we get –  

0.08 = 1.65 * Sqrt (0.5*0.5/n)

Squaring both the sides and solving, we get  

n = 1.65^2*0.5^2/0.08^2

n = 106.34 = 106

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