Sunday

March 1, 2015

March 1, 2015

Posted by **Megan Bill** on Sunday, December 12, 2010 at 5:06pm.

3(2y-4)=9-3(y+1)The answer is 2. How do you work it out to get the answer?

(x+5)(x-3)=9 the answer is -6,4

How do you work it out????

- Math -
**Reiny**, Sunday, December 12, 2010 at 5:12pmfirst one:

3(2y-4)=9-3(y+1)

6y - 12 = 9 - 3y - 3

6y + 3y = 6+12

9y = 18

y = 2

2nd:

(x+5)(x-3)=9

x^2 - 3x + 5x - 15 = 9

x^2 + 2x - 24 = 0

(x+6)(x-4) = 0

so x+6 = 0 or x-4 = 0

x = -6 or x = 4

**Answer this Question**

**Related Questions**

Math - Hi. Im trying to figure out how to solve an equation for x. The equation ...

Math- Reiny can you help me with this question - I know how to do the work, but...

Algebra - I've been trying to figure out this equation for over an hour but all ...

6th grade math - Find the value fir each expression. Show your work. (13.28 - 7....

Algebra - Hiya. I have 7 expressions that I have been asked to simplify. I ...

Algebra 2(check) cont.. - 1)solve the inequality -3(r-11)+15>_9 my answer = r...

math - I need help solve the equation by fractions 8/(21-y) = 12/(y+19) I think ...

math - so i got a math work sheet and i cannot figure out the math puzzle and to...

Math - Factor the following polynomials completely. How do you??? First question...

Dot product - I cant get the correct answer and I can't figure out what I am ...