Find the distance between two points a(-1,1) and b(3,-5)

let A be (x1,y1)= -1,1

B be (x2,y2)= 3,-5

distance between AB = root under (x2-x1)square + (y2-y1)square

=root under (3- - 1)square +(-5-1)square

= root under 4 square + (-6) square

=root under 16 +36

=root under 52 units

is ur answer

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mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

good luck on your studies! : )

david edward.