Solve the problem.One number is 4 less than a second number. Twice the second number is 38 more than 4 times the first. Find the two numbers.
A. 11 and 15
B. -16 and -12
C. -14 and -10
D. -15 and -11
Answer: D
Mathematics
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Which of the following is not a solution to the equation: 9x + y = 81? ?
A. ?(0, 81) B. ?(1, 72) C. ?(9, 0) D. ?(10, 9) E. ?(10, -9)
Mathematics
Verify that each equation is an identity.cot(2?)= 
What will be an ideal response?
Mathematics
Evaluate the radical expressions or indicate that the root is not a real number.
A. 16 B. -2 C. 2 D. not a real number
Mathematics
Without solving, determine the character of the solutions of the equation.x2 + 5x + 8 = 0
A. a repeated real solution B. two complex solutions that are conjugates of each other C. two unequal real solutions
Mathematics