Rearranging Formulas

Isolating a different letter in a formula, then using the rearranged version to find a value.

8 questions, free, marked as you go with a worked explanation on every one.

What this covers

• rearranging formulas

The questions

1. The perimeter of a rectangle is P = 2l + 2w. Rearrange it to solve for l.
2. Rearrange d = rt to solve for t, then find t when d = 120 and r = 30.
3. The area of a triangle is A = (1/2)bh. Rearrange it to solve for h.
4. Rearrange F = ma to solve for a, then find a when F = 20 and m = 5.
5. A circle's circumference is C = πd. Rearrange it to solve for d.
6. Rearrange V = lwh to solve for h, then find h when V = 60, l = 5 and w = 3.
7. A line has equation y = mx + b. Rearrange it to solve for x.
8. Rearrange I = Prt to solve for r, then find r, as a decimal, when I = 45, P = 500 and t = 3.

Answer these free