B. Find the GCF of 6, 18, and 30
C. Mulitiply and write the results in simplest form 2/9x4/5
D. Subtract 6/7- 2/7
E. Divide. Write the result in simplest form 9/10divided by 12/5
2007-04-20 15:05:53 · 5 answers · asked by Phaedra C 1 in Science & Mathematics ➔ Mathematics
a. 2*2*2*5
b. 6
c. 8/45 (I think)
d. 4/7
e. 3/8
2007-04-20 15:12:59 · answer #1 · answered by HRchick 4 · 1⤊ 1⤋
A) 40 = 2 x 20 = 2 x 2 x 10 = 2 x 2 x 2 x 5
B) The GCF is 6. (6 is a factor of 6, 18, and 30, and the GCF certainly can't be bigger than 6 because it has to be a factor of 6.)
C) (2/9) x (4/5) = (2 x 4) / (9 x 5) = 8 / 45. (This is already in simplest form.)
D) 6/7 - 2/7 = 4/7
E) (9/10) divided by (12/5) = (9/10) x (5 /12) = (9 x 5) / (10 x 12) = 45 / 120.
Writing in simplest form: 45 / 120 = 9 / 24 = 3 / 8.
2007-04-20 15:13:59 · answer #2 · answered by Anonymous · 1⤊ 0⤋
A. 2 x 2 x 2 x 5 = 2^3 x 5
B. 6 = 1, 2, 3, 6 18 = 1, 2, 3, 6, 9, 18 30 = 1, 2, 3, 5, 6, 10, 15, 30
C. 2 x 4 = 8, 9 x 5 = 45, 8/45
D. 6/7 - 2/7 = 4/7
E. 9 x 5= 45, 10 x 12= 120, 45/120 = 9/24 = 3/8
2007-04-20 19:55:56 · answer #3 · answered by bootis32 6 · 0⤊ 0⤋
A.
40=8*5
=2*2*2*5
B.
The GCF is 6.
C.
2/9*4/5=
8/45
D.
6/7-2/7=4/7
E.
9/10/12/5
9/10*5/12
3/2*1/4=
3/8
2007-04-20 15:24:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋
40=2x2x2x5
2/9 x4/5=8/45
GCF of 6,18,30
6=1,2,3,6,12,18
18=1,2,3,6.9.18
30=1.2,3,5,6,10,15,30
GCF= 6
6/7-2/7=4/7
9/10 divided by 12/5=
9/10 * 5/12
5 becomes 1 10 becomes 2 9 becomes 3 12 becomes 4
answer 3/8
2007-04-20 16:08:23 · answer #5 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋