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2 years ago

Which statement regarding the function y=cos(x) is true?

Mathematics

2 answers:

Amanda [17]2 years ago

7 0

Cos(x)=cos(-x)-For apex people who are trying to make sure.

MAVERICK [17]2 years ago

6 0

<span>A. cos(x) = cos(-x) [correct, since cos(x) is an even function]
B. Since the cosine function is even, reflection over the x-axis [y-axis] does not change the graph. [false]
C. cos(x) = -cos(x) [ false]
D. The cosine function is odd [even], so it is symmetrical across the origin. [false]</span>

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A four-digit code can use the numbers 1, 2, 3, 4. Any of the numbers can be repeated.

alukav5142 [94]

Answer:

256 codes

Step-by-step explanation:

3 0

2 years ago

Julio bought a total of 20 medium and large pumpkins. If he spent $53 and bought 6 more large pumpkins as medium pumpkins, how m

Tatiana [17]

20 medium and large pumpkins

m ... number of medium pumpkins
l ... number of large pumpkins

20 = m + l
20 = m + (m + 6)
20 = 2 * m + 6
2 * m = 20 - 6
2 * m = 14
m = 7 medium pumpkins

l = 20 - 7 = 13 large pumpkins

Result: Julio bought 13 large pumpkins.

5 0

3 years ago

What is 126/6 simplified to

MissTica

Answer: 21

Step-by-step explanation:

The reason why it's 21 because when you divide 126/6 you get a whole number instead of a mixed number.

7 0

2 years ago

Read 2 more answers

A group of friends were working on a student film. They spent all their budget on props and costumes. They spent $243 on props,

SVETLANKA909090 [29]

Answer:

The total budget for their student film was $540

Step-by-step explanation:

The total percentage of any quantity is 100%

∵ A group of friends was working on a student film

∵ They spent all their budget on props and costumes

∴ The total budget of the props and costumes = 100%

∵ They spent $243 on props

∵ They spent 55% of the total budget on costumes

→ Find the percentage of the props

∴ The percentage of the props = 100% - 55%

∴ The percentage of the props of the total budget = 45%

→ That means 45% of the total budget = 243

∵ 45% × total budget = 243

→ Change the percent to a number by divide it by 100

∵ 45% = 45 ÷ 100 = 0.45

∴ 0.45 × total budget = 243

→ Divide both sides by 0.45

∴ The total budget = 540

∴ The total budget for their student film was $540

4 0

3 years ago

Read 2 more answers

Please help precalculus

aleksley [76]

The max value can be found by setting the derivative equal to 0 and solving for x, then subbing that value for x back into the original function and solving for y. $f'(x)= \frac{(x^2+3)(0)-2(2x)}{(x^2+3)^2}$ which simplifies to $f'(x)= \frac{-4x}{(x^2+3)^2}$ . This derivative is equal to 0 when -4x is equal to 0. If -4x = 0, then x = 0. If we find f(0), then $f(0)= \frac{2}{(0)^2+3}$ and y here is 2/3. So the max value occurs at (0, 2/3). There you go!

3 0

3 years ago