Show by substitution whether the number r is a solution of the corresponding quadratic equation.4x2 + 7x - 2 = 0; r = - 
A. Yes
B. No
Answer: B
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Provide an appropriate response.A student argued that it is impossible to use the substitution method to determine if a system of equations has no solution or an infinite number of solutions. Is the student correct?
Fill in the blank(s) with the appropriate word(s).
Plot the ordered pairs on the rectangular coordinate system provided.A(- 
, -5), B(-3, 3)
A. 
B. 
C. 
D. 
Solve.A vendor has learned that, by pricing hot dogs at $1.25, sales will reach 91 hot dogs per day. Raising the price to
will cause the sales to fall to 61 hot dogs per day. Let y be the number of hot dogs the vendor sells at x dollars each. Write a linear equation that relates the number of hot dogs sold per day to the price x.
A. y = - 
x + 
B. y = 40x + 41
C. y = -40x - 141
D. y = -40x + 141
Write the negation of the statement. Remember that the negation of p ? q is p ? ~q.If 7x + 2y > 3, the answer is "Lake".
A. If 7x + 2y > 3, the answer is not "Lake". B. 7x + 2y > 3 and the answer is not "Lake". C. 7x + 2y > -3, so the answer is not "Lake". D. 7x + 2y ? 3 and the answer is not "Lake".