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3 years ago

Please help me out, thank you

Mathematics

1 answer:

babymother [125]3 years ago

6 0

Answer:

A. Not a function

B. function

C. function

D. not a function

Step-by-step explanation:

A is not a function because it has more than one of the same input ( x value)

B is a function because it does NOT have more than one of the same input (x value)

C is a function because it does NOT have more than one of the same input (x value)

D is not a function because it has more than one of the same input ( x value)

Hope this helps.

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Steven earns extra money babysitting he charges $33 for 4 hours and $57.75 for 7 hours entering an equation to represent the rel

sweet [91]

Answer:

y = 8.25x

Step-by-step explanation:

Linear Modeling

Some events can be modeled as linear functions. If a situation comes where a linear model is suitable, then we need two sample points to make the model and predict unknown behaviors.

The linear function can be expressed in the slope-intercept format:

$y=mx+b$

The equation of a line passing through points (x1,y1) and (x2,y2) can be found as follows:

$\displaystyle y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

Let's use linear modeling to represent Steven's earnings he makes babysitting. Call y the money he charges by x hours of work.

We know he charges y1=$33 for x1=4 hours, and y2=$57.75 for x2=7 hours. The ordered pairs are (4,33) and ( 7, 57.75)

Computing the equation of the line we have:

$\displaystyle y-33=\frac{57.75-33}{7-4}(x-4)$

Operating:

$\displaystyle y-33=\frac{24.75}{3}(x-4)$

$y - 33 = 8.25( x - 4 )$

$y = 8.25x - 33 + 33$

y = 8.25x

There is a proportional relationship.

6 0

3 years ago

(-13)+(-25).......-(-13)-(-25)

FinnZ [79.3K]

Answer:

Step-by-step explanation:

5 0

4 years ago

If 3 cats catch 3 rats in 3 minutes, how many cats will catch 100 rats in 100 minutes?

Lady_Fox [76]

3 cats can catch 3 rats in 3 minutes ==> 1 rat per minute.

It takes 3 cats to catch 1 rat per minute.

100 rats in 100 minutes ==> 1 rat per minute

The same 3 cats can do it, if they don't wear out and take naps.

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3 years ago

What us the value of the discriminant of the quadratic equation -2^2=-8x+8 and what does its value mean about the number of a re

svlad2 [7]

ANSWER

The discriminant is zero.

The given equation has one real root.

EXPLANATION

The given quadratic equation is:

$- 2 {x}^{2} = - 8x + 8$