Answer:
Step-by-step explanation:
let x and y be length and width of rectangle.
Perimeter=2(x+y)
area=xy
2(x+y)=1/2 xy
4(x+y)=xy
4x+4y=xy
x y-4y=4 x
y(x-4)=4 x

Answer:
64°
Step-by-step explanation:
We know that a right angle is 90°
so we do 90° - 26° = 64°
Answer:
84
Step-by-step explanation:
k(x+6)= 4x²+20
k(10)= k(4+6)= 4*4²+20= 64+20= 84
Answer:1 1/6
Step-by-step explanation: