Use an Euler diagram to determine whether the argument is valid or invalid.All tigers are felines.All felines are mammals.All mammals nurse their young.Therefore, All tigers nurse their young.
A. valid
B. invalid
Answer: A
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Name the conic or limiting form represented by the given equation.4x2 + 48x + 7y2 - 28y + 144 = -148
A. Ellipse B. Hyperbola C. Empty set D. Point
Write the matrix equation as a system of linear equations without matrices.
= 
A. 6x1 + x2 = -5 x1 + 7x2 = 7 8x1 - 5x2 = 6 B. 6x1 = -5 x1 + x2 = 7 8x1 - 5x2 = 6 C. 6x1 + x2 + x3 = -5 x1 - 5x2 = 7
Using the factoring method, solve for the roots of the quadratic equation.x2 + 6x - 40 = 0
A. x = 10, x = -4 B. x = 10, x = 4 C. x = -10, x = 1 D. x = -10, x = 4
Use the percent proportion to answer the question. Round your answer to the nearest tenth of a percent, if necessary.$15.26 is what percent of $286.67?
A. 53.0% B. 187.9% C. 1878.6% D. 5.3%