Solve by substitution and check.x + y = 9 y = 2x + 3
A. (7, 2)
B. (2, 7)
C. (3, 6)
D. (1, 9)
Answer: B
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 10i + (7 - 3t)j + 4tk, 0 ? t ? 2? ; ? = 4(1 + sin 4t)
A. 40? units B. 8? units C. 10 + 40? units D. 20 + 40? units
Mathematics
Round as indicated.96 to the nearest ten
A. 100 B. 80 C. 90 D. 110
Mathematics
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 3x - 8y - z = -1 x + 8y + 4z = 32 8x + y + z = 38
A. (-4, 1, 8) B. (4, 1, 5) C. (4, 5, 1) D. No solution
Mathematics
Indicate whether the function is one-to-one.A = {(-7, -7), (20, -8), (6, -19)}
A. Yes B. No
Mathematics