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2 years ago

Figure out the combination.

Mathematics

2 answers:

otez555 [7]2 years ago

4 0

Um..sorry I don’t understand the question

ValentinkaMS [17]2 years ago

3 0

sorry i don't understand

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Which function below is the inverse of f(x) = 7x-1/2

GaryK [48]

F(x)=7x-1/2
Add the half to the other side afeterreplacing f(x) with a zero
1/2=7x divide by 7
7/2=x, when y=0

4 0

3 years ago

The initial cost of an office fax machine is $100. After 1 year, its value becomes $80. Which is the correct linear depreciation

Elis [28]

Answer:

$y=100-20x$

Step-by-step explanation:

Let the x-axis be the time (in years) and the y-axis the value of the fax machine (in dollars).

We know that the initial value of the fax machine is $100; in other words, when the time is zero years, the value is $100, or as an ordered pair (0, 100). We also know that after 1 year the value decreases to $80, so (1, 80).

Now we can find the slope of the line passing through those two points using the slope formula

$m=\frac{y_2-y_1}{x_2-x_1}$

where

$m$ is the slope

$(x_1,y_1)$ are the coordinates of the first point

$(x_2,y_2)$ are the coordinates of the second point

Replacing values:

$m=\frac{80-100}{1-0}$

$m=-20$

Now, to complete our model we are using the point slope formula

$y-y_1=m(x-x_1)$

where

$m$ is the slope

$(x_1,y_1)$ are the coordinates of the first point

Replacing values:

$y-100=-20(x-0)$

$y-100=-20x$

$y=-20x+100$

$y=100-20x$

We can conclude that the correct linear depreciation model is $y=100-20x$

7 0

2 years ago

mr.jones has a new car. the manufacturer says that the car should get about 28 miles per gallon in the city.about how many miles

vlada-n [284]

He should be able to travel 322 miles. It would cost him $33.235 rounded up to $33.24.

7 0

3 years ago

What is the intercept for the graph of this line? 5x -3y =11

MatroZZZ [7]

Step-by-step explanation:

$5x-3y=11\\\\x-intercept\ is\ for\ y=0\\\\5x-3(0)=11\\5x-0=11\\5x=11\qquad\text{divide both sides by 5}\\x=\dfrac{11}{5}\\\\y-intercept\ is\ for\ x=0\\\\5(0)-3y=11\\0-3y=11\\-3y=11\qquad\text{divide both sides by (-3)}\\y=-\dfrac{11}{3}$

3 0

3 years ago

Which ordered pairs are on the line with equation y−0.75=1.25(x−3)?

Sergeeva-Olga [200]

The answer is Option D. (4,2)

in this type of question , you just need to input the (x,y) , and see if the amount is correct

y - 0.75 = 1.25 (x-3)

2 - 0.75 = 1.25 ( 4 - 3)

1.25 = 1.25 (1)

1.25 = 1.25

hope this helps

6 0

2 years ago