Add or subtract as indicated.(6y4 + 8y3 - 9y2 - 1) - (4y4 + 6y2 + 3y3 + 2)
A. 10y4 + 11y3 - 3y2 + 1
B. 2y4 + 11y3 - 3y2 + 1
C. 10y4 + 11y3 - 3y2 - 3
D. 2y4 + 5y3 - 15y2 - 3
Answer: D
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Perform the indicated operation. Write the result in standard form.(-4 + 6i) - 5
A. 1 - 6i B. 1 + 6i C. -9 + 6i D. 9 - 6i
Determine between which two consecutive whole numbers each square root lies.
A. 8 and 9 B. 9 and 10 C. 7 and 8 D. 10 and 11
Solve the problem.The inequality |T - 57| ? 13 describes the range of monthly average temperatures T in degrees Fahrenheit at a City X. (i) Solve the inequality. (ii) If the high and low monthly average temperatures satisfy equality, interpret the inequality.
A. 33 ? T ? 81; The monthly averages are always within 
B. 44 ? T ? 70; The monthly averages are always within 
C. T ? 70; The monthly averages are always less than or equal to 
D. 33 ? T; The monthly averages are always greater than or equal to 
Solve by the substitution method. x + 5y = -54x + 6y = -6
A. (1, -2) B. (1, 0) C. (0, -1) D. No solution