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4 years ago

CAN SOMEONE PLZZ HELP ME THE LAST QUESTION PLZZZZZ?????

Mathematics

1 answer:

MissTica4 years ago

5 0

first is proportional. y is 1 and 1/4 times x

second is not proportional.

reason? divided any y value by its corresponding x value and you'll keep getting 1.25, or 1 and 1/4. and the second one is not proportional because dividing the y values by their corresponding x value will give different answers.

maybe im wrong maybe im right you choose to trust me or not.

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9. Determine the equation of a line that passes though the points (3,-4) and (6,2). [

stira [4]

Answer:

y=2x-10

Step-by-step explanation:

First of all, remember what the equation of a line is:

y = mx+b

Where:

m is the slope, and

b is the y-intercept

First, let's find what m is, the slope of the line...

The slope of a line is a measure of how fast the line "goes up" or "goes down". A large slope means the line goes up or down really fast (a very steep line). Small slopes means the line isn't very steep. A slope of zero means the line has no steepness at all; it is perfectly horizontal.

For lines like these, the slope is always defined as "the change in y over the change in x" or, in equation form:

So what we need now are the two points you gave that the line passes through. Let's call the first point you gave, (3,-4), point #1, so the x and y numbers given will be called x1 and y1. Or, x1=3 and y1=-4.

Also, let's call the second point you gave, (6,2), point #2, so the x and y numbers here will be called x2 and y2. Or, x2=6 and y2=2.

Now, just plug the numbers into the formula for m above, like this:

2 - -4

6 - 3

or...

m=2

So, we have the first piece to finding the equation of this line, and we can fill it into y=mx+b like this:

3 0

3 years ago

What is the domain of f(x) = 3x – 2?

Elis [28]

Answer: las option.

Step-by-step explanation:

The equation of the line in slope-intercept form is:

$y=mx+b$

Where m is the slope of the line and b is the y-intercept.

Then function given in the problem has the form:

$f(x)=3x-2$

Where:

m=3

b=-2

Therefore, it is a linear function.

By definition, the domain of the linear functions that are not bounded, is all the Real numbers.

Therefore, the answer is:

{x | x is a real number}

3 0

3 years ago

Read 2 more answers

How many solutions are there? And what is the answers?

mariarad [96]

Answer:

x = 4 y = 3

Step-by-step explanation:

4 + 3 = 7

4 - 3 = 1

There is only one answer

6 0

3 years ago

Explain how you know that the some of 12.6, 3.1, and 5.4cis greater than 20

ddd [48]

You can add the numbers together so:

12.6
3.1
+ 5.4
 21.1

Since the sum of the numbers is 21.1, it is greater than 20

8 0

3 years ago

What is the length of the unknown leg in the right triangle?

Rama09 [41]

Answer:

we will use Pythagorean's Theorem

$25^{2}=20^{2}+b^{2}\\\\ b=\sqrt{25^{2}-20^{2}}\\\\ b=\sqrt{625-400} =\sqrt{225}\\\\ b=15$

Therefore, the missing leg is 15 meters long.

Step-by-step explanation:

we will use pythagoras theorem

Given that,

One leg of the triangle is 20 meters long,

the hypothenuse is 25 meters long,

and the leg missing is called x.

we will use Pythagorean's Theorem

$25^{2}=20^{2}+b^{2}\\\\ b=\sqrt{25^{2}-20^{2}}\\\\ b=\sqrt{625-400} =\sqrt{225}\\\\ b=15$

Therefore, the missing leg is 15 meters long.

3 0

3 years ago

Read 2 more answers