Solve the problem.How many 10-digit telephone numbers (area code + number) are possible if the first digit cannot be zero, the first three digits cannot be 800 or 900, and the number must end in 0000?
A. 654,642
B. 899,000
C. 898,000
D. 900,000
Answer: C
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Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
A. t4
B. t-7
C. 
D. 
Use a graphing calculator to solve the linear equation.(-9x + 8) + 4 = -8(x + 9)
A. {- 84} B. {- 76} C. {- 3} D. {84}
Find the slope-intercept form of the line satisfying the given conditions.Through (0, -10) and (-2, 0)
A. y = 
x - 2
B. y = - 
x - 2
C. y = - 5x - 10
D. y = 5x - 10
Provide an appropriate response.Suppose that you are solving a system of three linear equations in three variables by the row echelon method and you obtain the following augmented matrix. 
What row transformation would you perform next?
A. Add -12 times row 2 to row 3.
B. Add 
times row 2 to row 3.
C. Add -12 times row 1 to -6 times row 3.
D. Multiply row 3 by 
.