Use the discriminant to determine the number and type of solutions for the equation.7x2 = -4x - 1
A. One real-number solution
B. Two complex-number solutions
C. Two real-number solutions
Answer: B
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Solve the problem.The map shows the states New Mexico, Oklahoma, Texas, Arkansas, and Louisiana. Find a route that starts in Texas and crosses each common state border exactly one time.
A. TX ? LA ? AR ? TX ? OK ? AR ? TX ? NM ? OK B. TX ? LA ? AR ? TX ? OK ? NM ? TX C. TX ? NM ? OK ? AR ? LA ? TX D. No such route exists.
Does the system have one solution, no solution, or an infinite number of solutions?x - 6 = yy + 9 = x
A. One B. No Solution C. Infinite number
Solve the problem.A sample of 600 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 20 years? Round to the nearest whole gram.
A. 0 g B. 1 g C. 244 g D. 778 g
The sides in the pair of figures are proportional. Find the missing length(s).
A. x = 18 B. x = 13.5 C. x = 22.5 D. x = 24