Solve the system of equations by the elimination method.
x - 
y = -21
x + 
y = -7
A. (9, -12)
B. (-12, -9)
C. (-12, 9)
D. (12, 9)
Answer: C
Mathematics
You might also like to view...
Write the ratio as a fraction in lowest terms. Be sure to make all necessary conversions.9
days to 2
weeks
A. 
B. 
C. 
D. 
Mathematics
Choose the appropriate sketch for the indicated geometric object.Perpendicular lines 
and 
A.
| A? | B |
| C? | D |
B.
C.
D.
Mathematics
Find an equation y = mx + b that models the quantity y after x units of time.A quantity y is initially 40 and increases at a rate of 5 per minute.
A. y = 40x + 5 B. y = 40x - 5 C. y = 5x + 40 D. y = -5x + 40
Mathematics
A triangle with vertices at (x1, y1), (x2, y2), and (x3, y3) has area equal to the absolute value of D, where 
. Use this information to solve the problem.Use D to find the area of the triangle shown.
A. 13.0 B. 14.5 C. 14.0 D. 13.5
Mathematics