Saturday

August 30, 2014

August 30, 2014

Posted by **Momo** on Saturday, February 6, 2010 at 6:46pm.

3x-y-7<0

x+5y+3>=0

This is my thought process in this:

The first equation I can solve for y since we don't have to worry what x is. And I get y>3x-7.

The second one, however, y is being multiplied by 5, so I can't just divide by 5 on both sides because I don't know if the value of y will be positive or negative (and then I'll have to switch the sign).

...So I don't know about the second equation. Help please?

Thank you!

- Math -
**Damon**, Saturday, February 6, 2010 at 6:52pmx+5y+3>=0

5 y > -x -3

y > -x/5 -3/5

You divided by a positive number, so there is no reason to reverse the direction of the arrow. Now graph that line and shade above it.

- Math -
**Reiny**, Saturday, February 6, 2010 at 6:55pm5y ≥ -x - 3

but you are dividing by 5, so you don't have to worry about the inequality sign.

so

y ≥ -x/5 - 3/5

Now in each case, the equation becomes the boundary.

So for the first one, draw a dotted line, and shade in everything above that line.

For the second, draw a dotted line and shade in everything above that line.

**Related Questions**

Geometry&trigonometry - consider the polar graph §æ =(2/3)¦Ð. (¦Ð=pie) find the ...

MATH - Useing substitution/elimination method what is the solution set to x^2+y^...

compound inequality - olve. State the solution set using interval notation and ...

Algebra 1 (Reiny or Kuai) - Solve each equation. 1. p(1 + 4) - 2(p + 6) = 6 A: p...

math - What is the line of thought or sequence of thought for solving simple ...

Math - 1)Solve 3+2(1-x)>6 or 2x+14<=8. Graph the solution set on a number ...

Math - ( / means absolute value) Solve: 3+/2y-1/>=1. Graph the solution set ...

Algebra - Directions say that I have to solve and graph the equation using words...

Math - The graph of the equation y=4-x consists of all the points in the ...

Algebra - Question 1 Solve using the multiplication principle then graph. -15>...