Answer:
i hope its correct
Step-by-step explanation:
11x + 2y=68 ------------1
5x+y=13 ------------2
y= 13-5x. ------------3
put 3 into 1
11x +2(13-5x) =68
11x +26 -10x =68
x=42
put x =42 into 2
5(42) +y =13
210+y=13
y=13-210
y=197
Answer:
AB ≈ 6.71
Step-by-step explanation:
Calculate the length using the distance formula
d = 
with (x₁, y₁ ) = A (- 1, 6) and (x₂, y₂ ) = B (5, 3)
AB = 
= 
= 
= 
= 
≈ 6.71 ( to 3 significant figures )
Answer:
last one
Step-by-step explanation:
when u divide 3 and 4 is 0.75 and the only one the equals to that is 15/20
Answer:
Just find the distance of the vertices of the quadrilateral ( such as : AB, BC, CD DA )by using distance formula...
Then if opposite sides of quadrilateral is equal then it is rectangle .....
hope you understand...