Algebra 2
posted by Jessica on .
Can you help me set these up?
1.When 0.5cm was planed off each of the six faces of a wooden cube, its volume decreased by 169cm^3. Find its new volume.
2. The width, length, and diagonal of a rectangle are consecutive even integers. Find the integers

1) original volume= s^3
new volume=s^3169=(s.5)^3
multipy out the cube, and then solve. The s^3 should go away.
2)in a rectangle, diagonal^2=width^2+length^2
let n be width, n+2 be length, and n+4 be diagonal
(n+4)^2=n^2+(n+2)^2
solve for n