hi all!
can you please help me with some of these questions?
1. simplify (2/3)^3
2. Factorise;
x(y+2)-3(y+2)
3. i reduced a diagram on my computer using a scale factor of 80% (i.e. the linear dimensions of the diagram were reduced so that became 80% of the original dimensions). What scale factor is required to return the diagram to its original size?
thankz!
2007-07-23 23:23:35 · 5 answers · asked by i love...love 2 in Science & Mathematics ➔ Mathematics
1) 8/27
2) you have the answer
3)500%
2007-07-23 23:30:03 · answer #1 · answered by jemhasb 7 · 0⤊ 1⤋
1, and 2 have been done for you.
3] By reducing the linear dimensions by a scale factor of 80%,
then you have reduced the original area to 80% of 80%, which
is 64% of the original area, so the scale factor to return the
diagram to its original size is 100/0.64,, which is 1.5625
2007-07-24 07:15:18 · answer #2 · answered by Twiggy 7 · 0⤊ 0⤋
1) 2/3 x 2/3 x 2/3 = 8/27
2) (x-3) (y+2)
2007-07-24 09:24:48 · answer #3 · answered by Jenna 2 · 0⤊ 0⤋
1. 8/27
2 . this isn't working for me
maybe
xy + 2x -3y -6
2x +xy -3y = 6
doesn't look right
3. you have to expand it by 25 percent
2007-07-24 06:32:06 · answer #4 · answered by nickipettis 7 · 0⤊ 0⤋
sorry i can't be bothered to anwswer them all BUT the answer to 2. is
(y+2)(x-3)
2007-07-24 06:26:03 · answer #5 · answered by Gregia 2 · 0⤊ 0⤋