Write the expression in standard form.
? 
A. -63
B. 63
C. 63i2
D. -63i
Answer: A
Mathematics
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Add.(8x2 + 8x - 4xy - 4) + (9x2 - 3x + 3xy - 1)
A. 22x2 - 6xy B. 17x2 + 5x - xy - 5 C. 22x2 - xy - 5 D. 17x4 + 5x2 - x2y2 - 5
Mathematics
Solve the differential equation.25y'' - 40y' + 16y = 0
A. y = C1e(4/5)x + C2 e(-4/5)x B. y = (C1 + C2x) e(-4/5)x C. y = Ce(4/5)x D. y = (C1 + C2x) e(4/5)x
Mathematics
Which of the following pairs of variables is most likely to have a spurious correlation?
a. number of dollars earned vs. number of hours worked b. grade earned on a test vs. amount of time spent studying c. average life expectancy vs. number of TVs per home d. gas mileage vs. average car speed on a trip
Mathematics
Eliminate the parameter t in the following:
?
?
What will be an ideal response?
Mathematics