Answer:
−25x+54−32rx+64r−x^2
Step-by-step explanation:
(−28−32r−x+1)(x−2)
Add −28 and 1 to get −27.
(−27−32r−x)(x−2)
Apply the distributive property by multiplying each term of −27−32r−x by each term of x−2.
−27x+54−32rx+64r−x^2+2x
Combine −27x and 2x to get −25x.
−25x+54−32rx+64r−x^2
A group of k elements can be chosen from a group of n elements in

ways.

The answer is B. 495.
Answer:
x= -28
Step-by-step explanation:
Multiply both sides as in -7 and 4
x
-7= --- ---> -7 x 4= -28 = x
4
-28 = x. (Swap Sides) X= -28
Answer:
B) -3
Step-by-step explanation:
The sum of the three angles of any triangle is equal to 180 degrees.
180-50-87 = 43.
43 = x+46
x = 43-46
x = -3
21r < 7
Divide by 21
r < 7/21