(3 × 2)(7 2)(6 + 2) = (6 × 4)x.What's the value of x?
Answer(s): C
Solve the left side of the equation first. (6) (5) (8) = 240. Therefore, 240 = (6 × 4)x, which equals 240 = 24x.Now isolate x by dividing both sides of the equation by 24:240 ÷ 24 = 24x ÷ 24 or 10 = x.Check your answer by substituting 10 for x in the original equation.
Solve for x: 2x 6 = x + 5
Answer(s): B
Isolate x on one side of the equation:2x 6 = x + 52x 6 x = x + 5 xx 6 = 5x 6 + 6 = 5 + 6x = 11Check by substituting 11 for x in the original equation.
If I = prt, and p = $1,000, r = 7%, and t = 1, what does I equal?
Answer(s): D
Solve for I.I = (1,000) (7%) (1) or I = (1,000) (0.07) (1) = 70.
A circle has a radius of 5 inches.What's its approximate area?
Answer(s): A
The area of a circle is A = r2. A = 52. is approximately 3.14, so 3.14 × 25 means A is approximately 78.5 inches.
If F = M × A, then what does A = __________.
If you divide both sides of the formula by M, then A = F/M
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