Simplifying expressions
-21(a+2b) + 14a - 9b
-7a+3(a-c) + 5c
and what are:
coefficients
like terms
and constants
2007-05-09 13:48:02 · 4 answers · asked by L 1 in Science & Mathematics ➔ Mathematics
-21a - 42b + 14a - 9b = -7a - 51b
-7a + 3a - 3c + 5c = -4a + 2c
Coefficients are the numbers in front of the variables (letters), like terms are things iwth the same letter as 4x, x, -2x.
Constants are plain numbers.
2007-05-09 13:54:31 · answer #1 · answered by richardwptljc 6 · 0⤊ 0⤋
Question 1
-21a - 42b + 14a - 9b
- 7a - 51b
Question 2
- 7a + 3a - 3c + 5c
- 4a + 2c
Question 3
A coefficent is the number in front of a letter.
eg the coefficient of a in answer of question 2 is - 4
Like terms are terms that have the same letter
eg in the expression 2x + 3y + 6y
3y and 6y are like terms and can be gathered together to give 9y
2x + 3y + 6y = 2x + 9y
Constants are numbers that do not change in value
2007-05-10 14:34:22 · answer #2 · answered by Como 7 · 0⤊ 0⤋
lol i dont feel like doing my algebra either
2007-05-09 20:56:20 · answer #3 · answered by rybka 3 · 0⤊ 0⤋
remeber PEMDAS please excuse my dear aunt sally
2007-05-09 20:56:46 · answer #4 · answered by chrischick2438 1 · 0⤊ 0⤋