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Luden [163]
4 years ago
11

In two or more complete sentences describe how to determine if the function, f(x) = 2cos(x) is even by looking at a graph.

Mathematics
1 answer:
Tcecarenko [31]4 years ago
8 0

Answer:

<em>Observe the attached image</em>

Step-by-step explanation:

A function f(x) is even if

f(-x) = f(x)

This means that an input value x and -x have the same output value y

Therefore, check the graph and if it has equal values of y for the values of x and -x, then it is an even function.

Then the graph of y = f (x) will have symmetry with respect to the vertical axis

Observe in the attached image the graph of f (x) = 2cos (x)

It always has the same values of y for x and -x. Then f (x) = 2cos (x) It's an even function.

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You randomly survey students about year-round school. The results are shown in the graph.
Sergio [31]

Answer:

27% and 37%

Step-by-step explanation:

Percentage of students who oppose the year-round school = 68%

Percentage of students who support the year-round school = 32%

Margin of error = ± 5%

We have to set up the absolute valued equation to find the range(least and greatest) percentages of students who could be in favor of year-round school.

Since, the percentage of students who support the year-round school is 32% and the margin of error is 5%, this means, the difference between 32% and the least and greatest possible percentages is 5%. It can be either +5% or -5%

This thing can be expressed as absolute valued equation as:

| x - 32 | = 5

Here x represents the least and greatest percentages.

Expanding the equation, we can write:

x - 32 = -5                or                x - 32 = 5

x = -5 + 32                or               x = 5 + 32

x = 27%                                       x= 37%

This means the least percentage of students who be in favor is 27% and the greatest percentage of students is 37%.

6 0
3 years ago
28 is 9 less than twice a number
photoshop1234 [79]

Answer:

Step-by-step explanation:

28=2x-9

37=2x

x=18.5

5 0
3 years ago
Read 2 more answers
Can anybody help me? No links please lol
sleet_krkn [62]

Answer:

60% OF 6 = 3.6

         ↓

OF means multiplicatin

60% will turn into a decimal which is

↓

0.6 x 6 = 3.6 :)

Hope this helped!

-Maddison <3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Round 452 to the nearest hundred
Anna007 [38]

Answer:

500

Step-by-step explanation:


6 0
3 years ago
You can buy a 60 pack of paper towels for $75.99 or you can buy them individually for $1.65 each. Is it better to buy one bulk p
Ipatiy [6.2K]

Answer:

It's better to buy the bulk pack

Step-by-step explanation:

60 x 1.65 = $99

99 > 76

4 0
3 years ago
Read 2 more answers
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