View Full Version : Need help on my algreba 1

Green Special
11-03-2007, 03:40 PM
im doing slope-intercept stuff and i need help on this one Extra Credit

does -1x3a equal -3a?

11-03-2007, 03:44 PM
Yes, it does. 1 times any number equals that number. Add a negative sign and it makes that number a negative as well (provided it wasn't already negative). A negative x a positive= a negative, a negative x a negative is a positive. (srry for being over complicated:oops:)

So, yeah, -1 x 3a= -3a

Green Special
11-06-2007, 01:43 AM
heh, ok, wanted to make sure since it has an "a" right next to it i didn't know if ir could go with a number that dosen't have a term.

btw what grade u in?

Professor Geoffrey
11-06-2007, 02:10 AM
I'm in Pre-Algebra (I'm in 8th grade), and to me, this question is a peice of cake. XD

11-18-2007, 09:20 PM
Algebra, 8th grade.

Yeah, that's really easy.

Just know that with multiplying and dividing, if you're multiplying two number with the SAME sign, it's POSITIVE. For example, 3 * 3 = 9, -21y * -2 = 42y
Two numbers with DIFFERENT signs makes a NEGATIVE number. For instance, -1 * 3a = -3a.


Gold Groudon
11-28-2007, 10:51 AM
-*- = +
+*- = -
+*+ = +

That is how it works, you need the +'s and -'s? I can give you simple rules for those too, I learn that algebra in 7th grade first semester, I am yr 8 now.