Translate the phrase to an algebraic expression. Let x represent the unknown number.The product of -25 and the sum of a number and 39.
A. -25 + 39x
B. -975x
C. -25(x + 39)
D. -25x + 39
Answer: C
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Write the rate as a unit rate.171 miles in 3 hours
A. 174 miles/hour B. 57 miles/hour C. 513 miles D. 57 miles
A child has an enormous jar in which she has been saving all of her spare change. In order to determine exactly how much money she has in the jar, she dumps all of the coins on the floor and counts them. Under the watchful eye of her mother, she counts 180 pennies, 120 nickels, 100 dimes, and 80 quarters.The "80 quarters in the jar" describes
A. a strata. B. a sample. C. a parameter. D. a statistic. E. none of these
The graph of f(x) = ax2 + bx + c is given in the figure. Determine whether the discriminant is positive, negative, or zero.
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