?Find the matrix of the quadratic form associated with the quadratic equation 
.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: B
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Find the product.(-9)(-9)
A. 91 B. -81 C. -91 D. 81
Express each equation in slope-intercept form. Without graphing the equations, state whether the system of equations has exactly one solution, no solution, or an infinite number of solutions.6x + y = 255x + 8y = -15
A. one solution B. no solution C. infinite number of solutions
Write the decimal as a percent.The Santos family saves 0.23032 of their income.
A. 0.023032% B. 23.032% C. 2.3032% D. 0.0023032%
Solve the problem.After being struck with a hammer, a gong vibrates 21 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 28 vibrations B. 23 vibrations C. 94 vibrations D. 84 vibrations