x + y = 6 and x - y = 4.Solve for x.
Answer(s): B
x + y = 6, so y = 6 - x. Substitute this known value for y in the second equation.x - y = 4x - (6 - x) = 4x - 6 + x = 42x - 6 = 42x = 10x = 5
Solve for y:4(y + 3) + 7 = 3
Answer(s): D
4(y + 3) + 7 = 34y + 12 + 7 = 34y + 19 = 34y = -16y = -4
12 yards + 14 feet ÷ by 2 = __________.
Answer(s): A
Convert 12 yards and 14 feet to feet: (12 yards × 3 feet per yard) + 14 feet = 36 feet + 14 feet = 50 feet.Divide by 2 as instructed: 50 feet ÷ 2 = 25 feet.
x3 × x3 = __________.
If two powers have the same base, the numbers can be multiplied by keeping the base and adding the powers together.
41/5 + 12/5 + 33/10 = __________.
Convert to the lowest common denominator (which is 10), then add.41/2 + 12/5 + 33/10 = 42/10 + 14/10 + 33/10 = 89/10.
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