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IrinaK [193]
3 years ago
6

Does this table represent a function? Why or why not?

Mathematics
2 answers:
4vir4ik [10]3 years ago
8 0

Answer: D. Yes , because every x -value corresponds to exactly one y-value.

Step-by-step explanation:

  • A function is a special kind of relationship between two variables x and y where x represents input value and y represents output value such that each input has a one unique output.

In the given table , the first column represents Hours of training (input value (say x)) and second column represents Monthly pay (output value (say y)).

We can see that each input appears once .

Thus, the output value corresponds every input value is unique.

Hence, the table represents a function.

ivanzaharov [21]3 years ago
3 0
In order to be a function, every x-value must correspond to only one y-value.

Answer: D
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a mechanic worked 20 hours. another mechanic worked 15 hours. together they charged a total of $1950. what was the rate charged
Natasha_Volkova [10]

Answer: The mechanics both charged $70 and $45 per hour respectively

Step-by-step explanation: We shall start by calling the mechanics hourly rates x and y respectively. So if one worked for 20 hours and charged 20 times x dollars, and the other one worked for 15 hours and charged 15 times y dollars, totalling 1950 dollars, we can write the following expression,

20x + 15y = 1950

Also, if the sum of the two rates was 115 dollars, that means for working for an hour only, they both would earn

x + y = 115

We now have a pair of simultaneous equations

20x + 15y = 1950 --------(1)

x + y = 115 ------------------(2)

We shall use the substitution method for this problem.

From equation (2), make x the subject of the equation

x = 115 - y

Substitute for the value of x into equation (1)

20(115 - y) + 15y = 1950

2300 - 20y + 15y = 1950

By collecting like terms we now have

2300 - 1950 = 20y - 15y

(Note that when a negative value crosses to the other side of the equation, it becomes a positive value and vice versa)

350 = 5y

Divide both sides of the equation by 5

70 = y

We now substitute for the value of y into equation (2)

x + y = 115

x + 70 = 115

Subtract 70 from both sides of the equation

x = 45.

Therefore, the rate they charged per hour were $45 and $70 respectively.

7 0
3 years ago
una fotografía se reduce a una escala de 1:3 y enseguida se reduce nuevamente con una escala de 1:4 ¿cuáles la reduccion total q
Scrat [10]

Answer:

I don't speak that language

8 0
3 years ago
Any ordered pair that makes all equations in a system of equations true is a(n) ...?
timurjin [86]
That ordered pair is a solution to the equation system.
3 0
3 years ago
Which relation is a function?
andrey2020 [161]

Answer:

the one that looks like a V

1. take a ruler

2.move it across the graph

3.see if it crosses twice

ex:if it is a straight line than it wont work if it is like a V shape it will work

7 0
3 years ago
Read 2 more answers
Please help will give brainliest
Gelneren [198K]

Answer:

B

Step-by-step explanation:

It is B because to find the volume you multiply all three values together, which gets you 68.448. I multiplied 9.2x3.1, which got me 28.52, and then I multiplied 28.52 by 2.4 which got me 68.448.

6 0
2 years ago
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