A triangle with vertices at (x1, y1), (x2, y2), and (x3, y3) has area equal to the absolute value of D, where D = 
.Find the area of the triangle having vertices at P, Q, and R.P(0, 3), Q(5, 8), R(7, 3)
A. 0
B. 35
C. 5
D. 
Answer: D
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Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.A vertex at (0, 7) and a focus at (0, -10).
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Solve the problem.ABC phone company charges $25 per month plus 7¢ per minute of phone calls. XYZ phone company charges $16 per month plus 10¢ per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company the better deal?
A. Less than 300 minutes B. Less than 30 minutes C. More than 300 minutes D. More than 30 minutes
Find the product.(7x5)(3x2)
A. 21x10 B. 10x7 C. 10x10 D. 21x7
Solve the problem.Each patient will receive 
vial of medication. How many patients can be treated with 5850 vials of medication?
A. 6500 patients B. 5265 patients C. 9530 patients D. 650 patients