2.5 × 33 = __________.
Answer(s): C
2.5 × 33= 2.5 (3 × 3 × 3) = 2.5 × 27 = 67.50.
The fourth root of 16 is __________.
Answer(s): D
24 = 16; the fourth root of 16 is 2.
What's the equation of a line that passes through points (0, -1) and (2, 3)?
Answer(s): A
The slope of the line is equal to the change in y values divided by the change in x values.The change in y values is 4(3 1).The change in x values is 2 (2 0). 4/2 = 2.To find the intercept, substitute 0 for x in the equation y = 2x + b 1 = 2(0) + b.Therefore, b = 1, so the equation is y = 2x 1.
(12 yards + 14 feet) ÷ 5 = __________.
Convert 12 yards and 14 feet to feet: (12 yards × 3 feet per yard) + 14 feet = 36 feet + 14 feet = 50 feet. Divide by 5 as instructed: 50 feet ÷ 5 = 10 feet.
x3 × x4 = __________.
If two powers have the same base, they can be multiplied by keeping the base and adding the powers together.
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