# math

posted by .

(4,-2) and (2,-8) lie on the line Ax-2By = 28. What is the value of A?

THANK YOU SOOOO MUCH!

4,-2) and (2,-8) lie on the line Ax-2By = 28. What is the value of A?
Put the points in. First one.
A4-2B(-2)=28
4A+4B=28
A+B=7 call this equation 1)
second point:
A2-2B(-8)=28
2A+16B=28
A+8B=14 call this equation 2)

Now you have two equations...
A+B=7
A+8B=14
Now solve for A and B by any number of methods.

## Similar Questions

1. ### polynomial

can someone solve this one aswell? ax + 2ay + bx + 2by a(x + 2y) + b(x+2y) = (x+2y)(a+b)
2. ### Algebra 2

1. Give 3 points that lie on the line 4x-y=6. 2. Give 3 points that lie on the line 3x+2y=6. 3. Give 3 points that lie on the line y= -4. Can someone please help because I have no clue how to do these problems.
3. ### Algebra 2

1. Give 3 points that lie on the line 4x-y=6. 2. Give 3 points that lie on the line 3x+2y=6. 3. Give 3 points that lie on the line y= -4. Can someone please help because I have no clue how to do these problems
4. ### Algebra 2

1. Give 3 points that lie on the line 4x-y=6. 2. Give 3 points that lie on the line 3x+2y=6. 3. Give 3 points that lie on the line y= -4. Can someone please help because I have no clue how to do these problems
5. ### English

I need a opening line which will grab my reader's attention right away. Here are some examples: *"I was on fire" *"Everybody lies. cops lie. laywers lie. witnesses lie. victims lie." I can't think of anything. Any suggestions?
6. ### math

multiply -x^2by-x^2 + 4x – 2
7. ### Math

Use the distance formula to determine whether the points lie on the same line. (0,4),(7,-6),(-5,11). I know the distance formula, but I don't see how that will help me find out if they lie on the same line.
8. ### Math: Algebra

The points (5,2), (-10,-2), and (t,01) lie on the same line. Find the value of t. Please help me!
9. ### Algebra

which of the following is true bout a trend line for data?
10. ### Math

Rewrite the following definition as a biconditional: Points that lie on the same line are collinear. A.) If a point lies on a line, then it is collinear. B.) If a point lies on a line with another point, then the two points are collinear. …

More Similar Questions

Post a New Question