Translate the verbal phrase into a mathematical expression. Use x to represent the unknown number.Twice some number
A. 2 + x
B. 
C. 2 - x
D. 2x
Answer: D
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Add. 3 + 2 + (-6)
A. -5 B. 7 C. 11 D. -1
Provide an appropriate response.The speed you must travel for a given amount of time depends on the distance you must cover.(a)Write a function r(d) for the speed if the time is 5 hours and the distance covered is d.(b)What is the domain of this function out of context?(c)What is the domain of this function in the given context?(d)Find r(x), r
and r
,.(e)What happens to the speed if the distance is reduced (divided) by a constant c? Describe using an equation.
What will be an ideal response?
Use the substitution formula to evaluate the integral.
A. 
B. - 
C. 
D. - 
Solve the problem.A merchant has coffee worth $30 a pound that she wishes to mix with 70 pounds of coffee worth 
a pound to get a mixture that can be sold for 
a pound. How many pounds of the 
coffee should be used?
A. 280 pounds B. 210 pounds C. 140 pounds D. 105 pounds