2 answers:
Answer: The correct option is
(a) 6.
Step-by-step explanation: We are given to find the value of r from the following equation :

To find the value of r, we must solve the given equation for r as follows :

Thus, the required value of r is 6.
Option (a) is CORRECT.
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Answer:
-160 is the answer
Step-by-step explanation:
- × - = +
+ × + = +
so,-32-128
=-160
A.

B.
(x-1)+x+(x+1)=915
3x=915
x=305
304, 305, 306
Answer:
-146
Step-by-step explanation:
Answer:
Coefficient. For example, in the term -3x, -3 serves as the coefficient of x.