T/F every function is a relation

Answers

Answer 1
Answer: True
Every function is a relation, but not every relation is a function.

Hope this helps :)
Answer 2
Answer: Every function is a relation. However, not every relation is a function. In a function, there cannot be two lists that disagree on only the last element.

Hope this helps :)

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Functions of angles, I need help

Answers

Answer:

The Third Choice

Step-by-step explanation:

In this question, we have to compare the sine of angle A and the cosine of angle B. As a review, the sine function is

\text{sine} = \frac{\text{opposite}}{\text{hypotenuse}}

and the cosine function is

\text{cosine} = \frac{\text{adjacent}}{\text{hypotenuse}}.

For angle A, side BC is the opposite side, while side AB is the hypotenuse. [The hypotenuse of a right triangle is the side that is opposite to the 90 degree angle. In this case, AB is the hypotenuse because it is opposite of angle C, which measures 90 degrees.]

Now, we can determine the sine of angle A.

\text{sine(A)} = \frac{\text{BC}}{\text{AB}} = (4)/(5).

For angle B, side BC is the adjacent side, while side AB is the hypotenuse.

Using this information, we can determine the cosine of angle B.

\text{cosine(B)} = \frac{\text{BC}}{\text{AB}} = (4)/(5).

As we can see, both the sine of angle A and the cosine of angle B have the same value. In other words, they are equal to each other. Therefore, the correct answer is the third choice.

The answer is the third one

an 8 by 18 ft wall has three 4 by 5 ft windows.the area of the three windows is what percent of the area of the entire wall (including the windows)?

Answers

Answer:

Percentage of area of the three windows of the area of entire wall = 41.67%

Step-by-step explanation:

To find the percentage of area of the three window of the area of entire wall, we will need to find the area of the window (Length*breath) as well as the area of the entire wall (length*breath).

Area of the window = 4ft * 5ft = 20ft²

Area of three windows = Area of the window * 3

Area of the three windows = 20ft² * 3

Area of the three windows = 60ft²

Area of the entire wall = 8ft * 18ft

Area of the entire wall = 144ft²

Percentage of area of the three windows of the area of entire wall = area of the three windows / area of the entire wall * 100

= 60ft²/144ft² * 100

= 41.67%

area of windows = (3×4×5)
= 60
area of wall = 8×18
= 144
=(60÷144)×100
=0.4167 × 100
=41. 67% or
=42 %

Four out of every five visitors at an amusement park buy day passes what percent of the visitors buy passes?

Answers

The percentage of visitors who buy passes is 80%.

What is the percentage?

A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.

We know fractions can be converted into percentages by multiplying them by 100.

Given, Four out of every five visitors at an amusement park buy day passes.

∴ The percentage of people who buy passes is (4/5)×100 = 80%.

learn more about percentages here :

brainly.com/question/24159063

#SPJ5

80% 
THis is because you are supposed to multiply 20 to the denomintaor and numerator.
4 times 20=80
~JZ
Hope it helps

Which functions are increasing?

Choose all answers that are correct.

Answers

the 2,3 they are the best answers .

The increasing functions will be going upward.

Answers:-

- The second graph has an increasing function. 
- The third one is also increasing from 0 to the other ordered pair. 

Thirteen out of twenty-one people surveyed prefer fresh fruit over canned fruit. What percent of people prefer fresh fruit?

Answers

Answer:

The percent of the people who prefer fresh fruit is 61.9%

Step-by-step explanation:

Assume x% people prefer fresh fruit over canned fruit. Then x can be calculated as:

x= No of people who prefer fresh fruit * 100

         Total no of surveyed people

x = 13 * 100

     21

x = 61.9%

What is 86% written as a decimal

Answers

move the "%" two places to the left and replace it with a decimal
so it's 0.86
86% written as a decimal is .86.