Add or subtract as indicated.(12x2 - xy - y2) + (x2 + 10xy + 7y2)
A. 12x2 + 10xy + 7y2
B. 13x2 + 11xy + 8y2
C. 11x2 - 11xy - 8y2
D. 13x2 + 9xy + 6y2
Answer: D
You might also like to view...
Solve the problem.The position(in feet) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's velocity at time t.
A. v = A
cos 
ft/sec
B. v = A
cos 
ft/sec
C. v = A cos 
ft/sec
D. v = - A
cos 
ft/sec
Solve the problem by combining like terms.Find the perimeter of a triangle whose sides are of lengths 3x, 
and x.
A. 7x + 1 B. 9x2 + 3x C. 6x + 1 D. 7x
Simplify the expression.  FIGURE 1.png)
a. 9 b. 18 c. 216 d. 729
Solve the problem.A box contains a total of n + 4 light bulbs. In this box, there are 3 defective 40-watt bulbs, 6 defective 60-watt bulbs, and 7 defective 100-watt bulbs. If a light bulb is chosen at random by a quality control inspector, the probability, or chance, of one of the defective light bulbs being chosen is 
+ 
+ 
.Simplify this expression and then use the simplified expression to evaluate n = 96 and interpret the result.
A. 
; when there are 100 light bulbs, there are 6 chances in 50 that a defective light bulb is chosen.
B. 
; when there are 100 light bulbs, there are 4 chances in 25 that a defective light bulb is chosen.
C. 
; when there are 100 light bulbs, there are 8 chances in 25 that a defective light bulb is chosen.
D. 
; when there are 100 light bulbs, there are 10 chances in 50 that a defective light bulb is chosen.