a) 10(3x)
b) 5(6x+2)
c) 2(15x+5)
d) 10(3x+1)
2006-11-09 07:41:59 · 7 answers · asked by Chunky 1 in Science & Mathematics ➔ Mathematics
you multiply each term in the bracket (each bit separated by + or - by whatever is out side the bracket (in front of the bracket).
a) 10 times 3x = 30x
b) 5 times 6x + 5 times +2
=30x + 10 (this looks like the answer you're looking for)
c)2 times 15x + 2 times 5
= 30x + 10 (this looks like the answer you're looking for
d) 10 times 3x + 10 times 1
=30x + 10 ( they all look like the answer you're looking for except the first)
If the first (a) were 10(3x + 1) it would be the same as all the others
2006-11-09 07:54:38 · answer #1 · answered by rosie recipe 7 · 0⤊ 0⤋
d)10(3x+1)
10 times 3x= 30x
10 times 1=10
2006-11-09 15:44:07 · answer #2 · answered by horslover10 2 · 0⤊ 1⤋
Gosh, which one of those do you suppose multiplies out to 30x+10, and can't be factored further?
2006-11-09 15:45:27 · answer #3 · answered by Helmut 7 · 0⤊ 0⤋
d, you have to remember the 1.
to check, distribute it back out
10(3x+1)=30x+10
the others are wrong because:
a- it equals 30x
b & c- they are not factored completely
2006-11-09 15:45:21 · answer #4 · answered by moonfreak♦ 5 · 0⤊ 0⤋
All but a would work.
2006-11-09 15:44:06 · answer #5 · answered by suzieq_64093 4 · 0⤊ 0⤋
It's letters b,c, and d.
2006-11-09 15:44:27 · answer #6 · answered by urashortie103092 2 · 0⤊ 0⤋
the answer can be B,C, and D
2006-11-09 15:44:25 · answer #7 · answered by D.P 3 · 0⤊ 0⤋