The volume V of a rectangular box is given by the formula V = lwh where l is length, w width, and h height. What is the height of a rectangular box with volume 56 cm3, length 4 cm, and width 2 cm?
Substitute 56 for V, 4 for l, and 2 for w. Find the equation 56 = (4)(2)h, and solve to get 7 = h. Yep. That should be big enough to fit your little sister.
Solve the formula 8x + 4y = 12 for y.
We get , which simplifies to y = 3 – 2x.
Solve the formula z3 – 3x + z2 = z for x.
If 4x – y = 5, find x when y = 15.
x = 5
If y2 + 2y – 3x = 5, find x when y = 2.
x = 1
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