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3 years ago

Help me. I'm really confused!

Mathematics

1 answer:

Anettt [7]3 years ago

8 0

Answer:

Step-by-step explanation:

Remember, the first point in a bracket like this (6, 1) is the x coordinate. Here, 6 is your x coordinate. So, if we actually had the line (which we don't have right now, it would be lined up with the number 6 on the x axis. And the second point, 1 here, is the y coordinate. Which tells you where this point falls on the y axis. it would be lined up with the number 1 on the y axis. First, let's work on the parts where you are listing the points. it seems to give you the x coordinate 2 on the first one. So on the x axis which is the horizontal line that says Number of Books Sold, go to the number 2. Then y upward with your mouse and the first point that appears with the x coordinate of 2 (it's the 2nd point if you start from the bottom of the line and go up) has the y coordinate of 20 because if you use your mouse to go left on the same gray line that point is on, you will hit 20 on the line that says Total Amount Payed (this is your y axis). Now, on the next point it just gives you the y coordinate, 40. Which means that it should be on the grey line that hits the number 40 on the Total Amount Payed line (your y axis). So if you find that point and go down with your mouse on the gray line right under it, you should hit 4. So that point is (4, 40). 6 is not labeled but it is the gray line after the 5 on the x axis. If you go up 6, you hit the to right corner of the graph and if you trace it to the y-axis, it's not labeled but it should be 60 because if you pay attention, the numbers on the y-axis are going up by 10s. The x coordinate represents The Number of Books Sold because it says that under the x axis. The y coordinate represents the Total Amount Payed (dollars). ordered pairs are like ratios because they are both pairs. Ordered pairs tell you how much to go up, down, forwards, and backwards on a coordinate plane while ratios tell you a proportion. I am including a picture to help you out. I hope this made sense and was helpful!

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Type the correct answer in each blank. Use numerals instead of words. If necessary, use / for the fraction bar(s). John hosts an

Law Incorporation [45]

We know that John is hosting an art workshop on the weekends. He has an average of 14 students in each session and charges a fee of $12 per session. . He estimates that for every $2 increases in the fee, the average number of students reduces by 1.

Therefore, we can conclude that his revenue is $14 * 12$ or $168$ bucks.

The session price goes up in a pattern of 2.

For example, from 12 the session price goes to 14, 16, 18 and so on.

As each jumps goes by 2, the amount of students drop by 1.

(i.e from 14 students the number decreases to 13, to 12 and so on.)

As we can see the revenue begins at 168 and continues upward until it reaches 200 dollars and then starts to descend.

This indicates that the U-turn or vertex of the revenue function is approximately 4200, where h represents 4, and k is 200.

To solve we can use Parabola.

⇒ Parabola: any point is at an equivalent separation from:

a settled point (the concentration ), and

a settled straight line (the directrix )

____________________________________________________

$f (x) = a(x - h)^2 + k$ , where (h, k) is the vertex of the parabola.

⇒ $\left \{ {{y=192} \atop {x=2}} \right.$

⇒ $192 = a(2-4)^2+200$

⇒ $-8=a(-2)^2$

⇒ $-8=a*2^2$

⇒ $-8=a*4$

⇒ $-8=4a$

⇒ $-\frac{8}{4} = \alpha$

⇒ $\alpha = -2$

Now lets do the final step: Simplifying

$y-2(x-4)^2+200$ 

$y=-2(x^2-8x+16)+200$

$y=-2x^2+16x-32+200$

$c(x) = -2x^2+16x+168$

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4 years ago

Plzz help will give 15 pts and brainliest!!!!!!!!

Helga [31]

Answer:

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Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

I have to solve the system of linear equations by elimination. i also have to check my solution.

Travka [436]

Answer:

$x=1$ , $y=6$

Step-by-step explanation:

Give.

$x+2y=13$ ----------(1)

$-x+y=5$ ------------(2)

Solve this linear equation by elimination method.

Add equation 1 and 2

$x+2y=13$

$-x+y=5$

-----------------------------

$0+3y=18$

$3y=18$

$y=\frac{18}{3} \\y=6$

Put y value in equation 2

$-x+6=5$

$-x=5-6$

$-x=-1$

$x=1$

$x=1$ , $y=6$

6 0

3 years ago

Kendall swam (n) laps in a pool. Sophia swam 12 lesd than Kendall. How many laps did they swim altogether

damaskus [11]

Altogether they swam n + (n - 12) laps

Hope this helps :)

8 0

2 years ago

The base of a prism is an equilateral triangle that measures 3 centimeters on each side. the prism has a height of 15 centimeter

Elenna [48]

The image provided is the shape of a triangular prism.

The base of the prism (triangles) are both equilateral. This means that all sides measure 3 centimeters.

Find the area of one triangle based on the information given:

A = 1/2bh

**Notice that we cannot put in any number for the height of the triangular base because we are only given three side. As a result, we have to take a different approach to finding the area of the triangles. We can use another method known as Heron's Formula.**

You can use this formula to find the area of a triangle using the 3 side lengths.

Heron's Formula :

1) First, find the semi-perimeter of the triangle. We can find this by adding all the sides and dividing the sum by 2.

= 3 + 3 + 3 / 2

= 4.5

Use this formula to find the area:

A = √S(S - A)(S - B)(S - C)

**S, in this case, represents the semi-perimeter.**

Substitute the side lengths of the triangle and semi-perimeter.

A = √4.5(4.5 - 3)(4.5 - 3)(4.5 - 3)

A = √4.5(1.5)(1.5)(1.5)

A = √15.1875

Then, we simplify the number by turning the decimal into a fraction and further reducing it.

We would get:

A = √243 / √16

Simplify √16 into 4 and simplify the radical √243 into 9√3 / 4.

Now, multiply this number by two because we have another triangular base.

A = 9√3 / 4 × 2

A = 9√3 / 2 or 7.79422863406

2) Now that we have the surface areas of both triangles, we can find the surface areas of the rectangles.

This is easier to find because the triangles are equilateral and the height of the prism is simply 15.

A = lw

A = (15)(3)

A = 45

45 is the area of one rectangle. Since there are 3, multiply 45 by 3.

A = 45 × 3

A = 135

3) Add up all your values to find the surface area.

S.A. = 135 + 7.79422863406

S.A. = 142.794228634 cm²

Solution : 142.794228634 cm²

5 0

3 years ago