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Inessa05 [86]
3 years ago
7

How do I show that V=28x^2 - 2x^3 ??

Mathematics
1 answer:
Xelga [282]3 years ago
8 0
You have to prove your work. It can be difficult... But I believe in you! The way to do it, is to do the math out. If you have 2 different exponents, then you'll have to create multiple equations to solve, and use them to find what Y or X is.
Example: 
4y + 8<em>x = </em>112
Lets do y first. In order to do this, you need to get Y alone.
4y = 112 - 8x
Then, we divide.
y = 28 - 2x
Then insert your y value into the equation: 4(28 - 2x) + 8x = 112
Solve that, and you will have your x value! Then plug in your x value to find the y value. After that, insert both to check your work. There you go! That's the answer to finding the x. Then plug in your new x value, and complete the equation! Make sure to show all of your work!
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Use finite differences to identify the degree of the polynomial that best describes the data. 9 10 11 12 13 14
worty [1.4K]

The forward differences for this data is 1, 1, 1, 1, 1, 1 (since 10 - 9 = 1, 11 - 10 = 1, etc). Since we only need one iteration of differences, a linear polynomial will fit the data exactly.

4 0
2 years ago
|2x-3|=2 please answer this by Wednesday. I have no idea how to solve this. I wasn't paying attention
Sholpan [36]

Answer:

x=2.5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
This system of equations is shown on the graph: 2y − 4x = 6 y = 2x + 3 Which statement about the system is true?
mart [117]

Answer:

Infinitely many solutions

Step-by-step explanation

The answer would be D.

6 0
3 years ago
The point-slope form of the equation of a line that passes through points (8, 4) and (0, 2) is y – 4 = (x – 8). What is the slop
Elenna [48]
The slope-intercept formula can be written as follows:

y = mx + b

The variable "m" represents the slope of the line, while "b" represents the y-intercept. We'll start with the y-intercept.

We know that the y-intercept can be defined as the value of "y" when "x" is equal to zero. To do this, we will need to find point (0,y). The original problem gives us two points, one of which is (0,2). Because "x" is equal to zero, we know that the y-intercept is 2. Substitute this value into the slope-intercept formula:

y = mx + 2

Now we need to find the slope. Slope can be defined as the "rise" of the line over the "run" of the line. In other words, calculate the change in y-value over the change in x-value. To do this, we will use the "x" and "y" values of the two points given in the problem.

Starting with the y-values (rise), we have 2 and 4. The difference between these two values is 2. Moving on to the x-values (run), we have 0 and 8. The difference between these two values is 8. Now put rise over run and substitute this value into the slope-intercept formula:

y = (2/8)x + 2

Now simplify the right side of the equation:

y = (1/4)x + 2

We now have a complete slope-intercept formula of the line.

I hope this helps!
8 0
3 years ago
In KLM, LM=7 and angle K=45. Find KL. Leave your answer in simplest radical form.
Sphinxa [80]
Answer in simplest radical form would be 7.(:
5 0
4 years ago
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