The question is
in the link below

D: -3

Step-by-step explanation:

In order to find a slope of a line from two pairs, one way you can do that is by using a formula.

The formula is as follows:

Y² - Y¹

⁻⁻⁻⁻⁻⁻⁻⁻⁻

X² - X¹

Using this formula, let's plug in our values.

1. Our first Y, is -4. Place that into the equation above for Y².

2. Our second Y, is 8. Place that into Y¹. Wait! Since it's negative in the equation, your positive eight must turn into a -8.

3. Our first X, is 3. Just like our first Y, plug it into your X².

4. Our second X, is -1. Since it is already negative, and the equation is has a negative in it, the negative plus a negative makes the number positive.

Your equation should look like this: (now solve)

-4 - 8           -12

=  

3 + 1            4

Great, you've made it this far, there's ONE more step! Simplify the problem!

4 goes into 12, 3 times! This is because 4x3 is 12! Since your 12 is negative, your answer MUST stay negative, leaving your answer as -3.

If this leaves you confused, feel free to ask me more questions! :)

the range is 19

step-by-step explanation:

the range is biggest number minus the smallest, so in this case it would be

41 - 22 = 19

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".