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3 years ago

What is the change in total cost for each book printed?

Mathematics

1 answer:

Yuki888 [10]3 years ago

8 0

Since y is cost and x are books, you plug in the numbers that each question implies:

First, What is the change in the total cost for each book printed?

Well, we know the equation is linear, so the cost should be the same with each book. Let's plug in 2 numbers, and see how the cost changes:

for 1 book (x = 1)

1150+25(1)= 1175

For 2 books (x - 2)

1150+25(2) = 1200

Next, to find the change in total cost, subtract these 2 answers:

1200 - 1175 = 25

$25.00 is the change in total cost. Notice that this number is also the slope of this linear equation (the term in front of the x.

For the next question: What is the cost to get started ( before any books are printed )?

Well, for that, we set x = 0 since there are no books:

1150+25(0)= 1150

$1150.00 is the startup cost

i gotchu son

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The cost of 21 articles is equal to selling price of 18 articles. find the profit or loss percent.

Alex_Xolod [135]

Answer:

If all the items are sold, the profit percentage is 14.28%.

Step-by-step explanation:

Given that the cost of 21 articles is equal to selling price of 18 articles, to find the profit or loss percent the following calculation must be performed:

21 = 100

21 - 18 = X

21 = 100

3 = X

(3 x 100) / 21 = X

300/21 = X

14.28 = X

Therefore, if all the items are sold, the profit percentage is 14.28%.

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fgiga [73]

Answer:

$\large\boxed{13w^4+11v}$

Step-by-step explanation:

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3 years ago

What is the focus of the parabola

Blizzard [7]

Answer:

(-4,1)

Step-by-step explanation:

The given parabola is

$y = - \frac{1}{4} {x}^{2} - 2x - 2$

When we rewrite in vertex form, we get;

$y = - \frac{1}{4} {(x + 4)}^{2} + 2$

${(x + 4)}^{2} = - 4( y - 2)$

When we compare to:

${(x - h)}^{2} = 4p( y - k)$

We have 4p=-4

This means p=-1

But the vertex is at:

(-4,2)

Since it is a vertical parabola that opens down, the focus is one unit(|p|=1) below the vertex.

Hence the focus is (-4,1)

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4 years ago

Maria and her friends went for a bike ride. The start and end times are shown below. How long did they ride? 2 hours 23 minutes

lesya692 [45]

Answer:

1 hour 37 minutes

Step-by-step explanation:

From the image attached, we can see the start and end time represented by the clock. To calculate the length of time that Maria and her friends rode, we just have to subtract the start time from the end time.

From the end time clock, we can see that the end time is 2:24, while from the start time clock, we can see that the start time is 12:47. Hence, the length of time they rode is:

Length of time for bike ride = 2:24 - 12:47 = 1 hour 37 minutes

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3 years ago