Decide whether the ordered pair is a solution of the given system.(5, -1)x + y = -6x - y = -4
A. Yes
B. No
Answer: B
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Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.9x + 5y = -38-7x - 2y = 39
A. Cramer's rule does not apply since D = 0; ? B. {(-7, 5)} C. {(-8, 6)} D. {(-7, 6)}
Provide an appropriate response.Sally earns $15.00 per hour She has decided to automatically save one tenth of the money she earns after her weekly $10.00 Health Care Costs have been subtracted. She wants to save at least $50.00 each week. How many hours must she work each week?
Fill in the blank(s) with the appropriate word(s).
Solve the problem. Round to an appropriate number of significant digits.Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 1000 gal of gasohol containing 10% alcohol?
A. 50 gal 5%, 120 gal 12% B. 714 gal 5%, 714 gal 12% C. 417 gal 5%, 583 gal 12% D. 286 gal 5%, 714 gal 12%
Let x be a number. Translate the following into an expression or an equation, as appropriate, and then simplify the expression or solve the equation.One-half a number, minus ten, plus three times the number
A. 
x - 10 + 3x
B. 
x - 10
C. 
x - 7
D. 
x - 5