Solve the system of equations by substitution.x + y = -8x - y = 18
A. (5, 13)
B. (5, -13)
C. (8, 5)
D. (8, -13)
Answer: B
You might also like to view...
Solve the given system of equations algebraically. 2x2 + y2 = 173x2 - 2y2 = -6
A. x = 2, y = 3; x = 2, y = -3; x = -2, y = 3; x = -2, y = -3 B. x = 2, y = -3; x = -2, y = 3 C. x = 1, y = 3; x = 1, y = -3; x = -1, y = 3; x = -1, y = -3 D. x = 1, y = 3; x = -1, y = -3
Solve the problem.In an amplifier circuit, the current i (in A) changes with time t (in s) according to i = 0.03t
. If 0.6 C of charge has passed a point in the circuit at t = 0, find the total charge to have passed the point at t = 0.5 s.
A. 0.624 C B. 0.596 C C. 0.014 C D. 0.604 C
Perform the indicated operations and write the answer in the form 
where a and b are real numbers.(3 + 4i)(8 + 4i)
A. 8 + 44i B. 40 + 20i C. 8 - 44i D. 16i2 + 44i + 24
Solve the problem.In a survey of 421 computer buyers, 213 put price as a main consideration, 205 put performance as a main consideration, and 57 listed both price and performance. How many computer buyers listed other considerations? How many looked only for performance?
A. 156; 148 B. 60; 205 C. 60; 148 D. 117; 205