Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.a + 1 + 
+ . . . + 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = 4x2 + 4y2 + 2
A. 
B. 
C. 
D. 
Mathematics
Multiply.(x + 5)(x2 - x + 7)
A. x3 + 4x2 + 2x + 35 B. x3 + 4x2 + 35 C. x3 + 6x2 + 12x + 35 D. x3 + 35
Mathematics
Solve the problem.In a certain city, the cost of a taxi ride is computed as follows: There is a fixed charge of $2.75 as soon as you get in the taxi, to which a charge of $1.75 per mile is added. Find a linear equation that can be used to determine the cost, y, of an x-mile taxi ride, and use this equation to find the cost of a 4-mile taxi ride.
A. $9.63 B. $9.75 C. $10.65 D. $9.93
Mathematics
Write the rate as a unit rate.416 miles in 8 hours
A. 52 miles/hour B. 52 miles C. 3328 miles D. 424 miles/hour
Mathematics