Saturday

April 19, 2014

April 19, 2014

Posted by **Samantha** on Thursday, June 4, 2009 at 8:53pm.

a. 3x - 9 = 3x

b. 4p + 7 = 7 + 4p

c. 2w = 0

d. 5k = 5

- ALSO... -
**Samantha**, Thursday, June 4, 2009 at 8:54pmWhat's an identity?

- Math (Algebra/Pre-Algebra) -
**Reiny**, Thursday, June 4, 2009 at 9:01pman identity is an equation which is true for all values of the variable

As a quick test, if you solve it, and you get a true statement, then it is an identity.

e.g. look at the first answer

3x - 9 = 3x

-9 = 0, which is NOT true, so Not an identity

but

4p + 7 = 7 + 4p

solving this we get

0 = 0 which is TRUE, so it is an identity.

- Math (Algebra/Pre-Algebra) -
**Samantha**, Thursday, June 4, 2009 at 9:03pmThat makes so much sense! Thank you sooooooooo much! =]

**Related Questions**

math - what property is being used in the equation 4p+7+7+4p.

math, algebra - 17. Look at the pattern below. 24, 28, 32, 36, 40, . . . Which ...

Algebra - (3x+4)/(3x-4)+(3x-4)/(3x+4) --------------------------- Divide top by ...

math - I know i'm a slow bunny and the answer is in my face but please help! (4p...

pre-algebra - how do you solve for 4p-13p-p=-150

Math - Which is the expression that can be factored using the greatest common ...

chemistry - (a) The characteristic emission from Ca occurs at 422.7 nm and ...

algebra 1 - is this correct 3x-3=0 3x-3+0=0 3x-3=0 f(x)=3x-3 table: 1 f(1)=3(1)-...

algebra - what is an equation of the line that passes through the point (4,-6) ...

Pre-calc, Algebra, Trig - (2x squared-3x +1)(4)(3x+2)cubed (3)+(3x +2)raised to ...