Solve the system by substitution.8x + 8y = 39x + 9y = 18
A. ?
B. {(1, 1)}
C. {(x, y) | 8x + 8y = 3}
D. {(5, 9)}
Answer: A
Mathematics
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Use the definition to find an expression for the instantaneous velocity of an object moving with rectilinear motion according to the given function relating s (in ft) and t (in s).s = 4t2 - 4t + 5
A. 8t2 - 4t B. 4t - 4 C. 4t2 - 4 D. 8t - 4
Mathematics
Solve the rational inequality. Express the solution in interval notation.
? 3
A. (-9, 8) B. (-9, 8] C. (-9, 32) D. (-9, 32]
Mathematics
Give the degree measure of ?.? = arccos (0)
A. 90° B. 0° C. 180° D. 45°
Mathematics
Use a product-to-sum identity to rewrite the expression.sin 35° sin 52°
A. 0.5(sin(-17°) - sin(87°)) B. 0.5(cos(87°) + cos(-17°)) C. 0.5(sin(87°) + sin(-17°)) D. 0.5(cos(-17°) - cos(87°))
Mathematics