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bonufazy [111]
2 years ago
10

An auto shop charges a customer an equal amount for each new tire purchased plus an additional fee for an oil change.

Mathematics
1 answer:
Nitella [24]2 years ago
6 0

The cost per unit of the auto shop function is the slope of the function

87 represents the slope and the cost per tire purchased

The function is given as:

\mathbf{C(t) = 87t + 32}

A linear function is represented as:

\mathbf{C(t) = mt + b}

Where:

m represents the slope or the unit rate.

So, by comparison:

\mathbf{m = 87}

This means that 87 represents the slope and the cost per tire purchased

Read more about slopes at:

brainly.com/question/18576224

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A motel has 20 rooms. If the manager charges $60 per room per night, all the rooms will be rented. For each $5 increase, one les
serious [3.7K]

Answer:

Rent: $80

Revenue: $1280

Step-by-step explanation:

We can solve this by representing the problem as an expression and finding the maximum of that

We know that revenue = number of sales * average price. If x represents the amount of 5 dollar increases, then we subtract x from 20 to get the total number of sales. For example, if there was 1 5 dollar increase, the number of sales would be 20-1 = 19. Similarly, the average price is equal to 60 + 5x, as we add $5 for each x. For example, if there were 3 $5 increases, it would cost 60 + 3 * 5 = 75 per room.

Therefore,

revenue = (20-x) * (60 + 5x)

= 1200 + 100x - 60x - 5x²

= -5x²+40x+1200

This is a quadratic expression -- we know it is one because it is of form ax²+bx+c, where a=-5, b=40, and c = 1200. Because the a is negative, the quadratic expression (which forms a parabola) opens downward, meaning that there is a peak of the expression at its vertex.

The x value of the vertex of a parabola given this form for the quadratic expression is (-b/2a) , which is (-40/(2*(-5))) = -40/-10 = 4 here, and plugging that into our equation,

y= -5x²+40x+1200

= -5 (4)²+40(4) + 1200

= -5 * 16 + 160 + 1200

= 1280 as our maximum revenue

Therefore, the amount of 5 dollar increases is 4, making the average price equal to 60 + 5 * 4 = 80 dollars

5 0
2 years ago
Which of the following points are solutions t the equation 3x - 4y - 8 = 12?
mixas84 [53]

the answer is x = 20/3 + 4/3y

how to: 3x - 4y - 8 = 12

3x = 12 + 4y + 8

3x = 20 + 4y

x = 20/3 + 4/3y

3 0
3 years ago
Find the value of x ?
Varvara68 [4.7K]

Answer:

x = 10

Step-by-step explanation:

\frac{AE}{EC\\} = \frac{DE}{BC}

2/4 = 5/x

1/2 = 5/x

cross multiply

x=5*2 = 10

4 0
2 years ago
Find the zeros of the function.<br> f(x) = 2x2 – 2x – 12
Amiraneli [1.4K]

Answer:

Step-by-step explanation:

2x^2-2x-12

This has solutions of x=3 and x= -2

3 0
3 years ago
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The number of pencils sold varies directly as the cost.if 5 pencils cost $0.45,find the cost of 7 pencils.
vitfil [10]
7 times 0.45 divided by 5 and you get 0.63
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