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Bumek [7]
3 years ago
11

Which of the following is an even function?

Mathematics
2 answers:
ycow [4]3 years ago
5 0
An even function is a function that is symmetrical over the y axis. With that said, D is the answer.
anyanavicka [17]3 years ago
4 0

Answer:

The correct answer is D) f(x) = 7

Step-by-step explanation:

A function is even when  f(-x) = f(x) for all x in the domain of f.  We can say that the function is simetrical over x axis.  

To get which is the correct answer ,  we try the same  function for -x and x and we have to find the same answer. We are going to try with -5 and 5

A) f(x) = (x – 1)^2

f(5) = (5 – 1)^2 =16

f(-5) = (-5 – 1)^2 =36

Not even funtion

B) f(x) = 8x

f(-5) = 8 *-5 =-40

f(5) = 8*5  =40

Not even funtion

C) f(x) = x^2 – x

f(-5) = -5^2 – -5=30

f(5) = 5^2 – 5 =20

Not even funtion

D) f(x) = 7

f(-5) = 7

f(5) = 7

Even

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7 0
3 years ago
A phone company offers two packages of service. Package A is $35.00 per month with an additional charge of $0.15 per minute for
ella [17]

Answer: 200 minutes have to be used for the costs of both plans to be the same.

Step-by-step explanation:

Let x represent the number of minutes that have to be used for the costs of both plans to be the same.

Package A is $35.00 per month with an additional charge of $0.15 per minute for long distance. This means that the cost of using package A for x minutes in a month would be

35 + 0.15x

Package B is $45.00 per month with an additional charge of $0.10 per minute for long distance. This means that the cost of using package A for x minutes in a month would be

45 + 0.1x

For both costs to be the same, it means that

35 + 0.15x = 45 + 0.1x

0.15x - 0.1x = 45 - 35

0.05x = 10

x = 10/0.05

x = 200

3 0
3 years ago
How do you get the answer for this question? I can't figure it out:( .​
just olya [345]

I need the answer for this one too

4 0
3 years ago
Read 2 more answers
What would the answer be because I already tried everything and I just can’t get it
Mrac [35]

Answer:

e = 56

Step-by-step explanation:

Use cross multiplication.

28 * 14 = 7e

Simplify

392 = 7e

Divide each side by 7

e = 56.

5 0
4 years ago
Read 2 more answers
What is the surface area of each triangular prism?
SOVA2 [1]

the surface area of the above triangular prism is 156 square inches.

Step-by-step explanation:

multiply the sum of the triangle sides by the height of the prism and add the values together for the answer, remembering to include the correct unit of measurement.

8 0
3 years ago
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