Simplify the algebraic expression by collecting and combining like terms.9.4ab + 8.7 - 7.1ab - 7.5
A. 2.3ab + 1.2
B. 2.3ab + 16.2
C. 16.5ab + 16.2
D. -2.3ab + 1.2
Answer: A
Mathematics
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Solve the system using matrices.x - y+ 5z = 7x + 3y + z = 110.4x + 0.1z = 0.2
A. (0, 3, 2) B. No solution C. (2, 3, 0) D. (2, 0, 3)
Mathematics
Use the graph to evaluate the limit.
f(x)
A. - 
B. ?
C. -1
D. 
Mathematics
Graph the parabola.y = 4x2 + 2x - 5
A. 
B. 
C. 
D. 
Mathematics
Solve the problem using your calculator.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Use a graphing calculator to model the data with a linear function that predicts the number of products sold as a function of the cost of advertising.
A. y = 55.8 - 2.79x B. y = -26.4 - 1.42x C. y = 55.8 + 2.79x D. y = 26.4 + 1.42x
Mathematics