Find the sum of the arithmetic series using a formula.The first 42 terms of the series whose terms are an = 10 - 3n
A. -2489
B. -2189
C. -4578
D. -2289
Answer: D
Mathematics
You might also like to view...
Identify the complex number as real or imaginary.- 
A. Imaginary B. Real
Mathematics
Combine like terms.5ab + 9a + 15 + 4ab
A. 18a2b + 15 B. 18a + 9b + 15 C. 18ab + 15 D. 9ab + 9a + 15
Mathematics
Write the matrix equation as a system of equations and solve the system.
= 
A. {(3, 2)} B. {(-3, -2)} C. {(2, 3)} D. {(-2, -3)}
Mathematics
Solve the problem.The number of traffic accidents has been decreasing in a certain county each year. The data is shown in the table for several recent years. The set of data can be approximated with a linear equation.
Find an equation of the line.
A. y = -75x + 631 B. y = -75x + 621 C. y = 75x + 631 D. y = -85x + 631
Mathematics