Answer:
Perimeter of Triangle: 

Step-by-step explanation:
The perimeter is the sum of all of the sides of the triangle.
Hence, the perimeter 
Since the perimeter is 90,
.
Subtract 15 from both sides:


Divide both sides by 6:


Step-by-step explanation:
2(sp)=ln
6x+2=10x-6
8=4x
x=2
therefore sp=3×2+1=6+1=7
Option D
Answer:A
Step-by-step explanation: your answer is A
Answer:

Step-by-step explanation:
We are given that


We have to find the value of Q(x) and Remainder R(x).
Quotient, 
Remainder,
We know that

