Answer:

Step-by-step explanation:

Answer:
10
Step-by-step explanation:
Slope (m) of two points is expressed as :
m = (y2 - y1) / (x2 - x1)
Given m = 2
the equation becomes;
2 = (r - 2) / (10 - 6)
2 = (r - 2) / 4
cross multiplying becomes ;
2 * 4 = r - 2
8 = r - 2
r = 10
Answer:
A
Step-by-step explanation:
Length : 
Perimeter: 
Perimeter = 2(Length + Width)
15x + 17y = 2(
+ Width)
15x + 17y = 7x + 14y + 2(Width)
15x + 17y -7x -14y = 2(Width)
8x + 3y = 2(Width)
Width = 
Width = 4x + 3y/2
Answer:
Step-by-step explanation:
s(1-30/100)=420
s(100-30)/100=420
s(70/100)=420
s(7/10)=420
7s=4200
s=600