Domain is the set of first numbers of the order pairs.
Range is the set of second numbers of the ordered pairs.
Answer:
56
Step-by-step explanation:
(x+2y)(x-5y)
do foil method:
x^2-5xy+2xy-10y^2
simplify x^2-3xy-10y^2,
so d is correct.
Answer:
triangle 1, triangle 3,
Step-by-step explanation:
Triangle 1= 
Triangle 2= is wrong
Triangle 3= 
Triangle 4= is wrong.

whatever the amounts of "x" and "y" are, they must add up to 5Liters
thus x + y = 5
and whatever the concentrated quantity is in each, they must add up to (5)(0.14)
notice, that we use the decimal notation for the amount of juice concentration, that is, 15% is just 15/100 or 0.15, and 14% is just 14/100 or 0.14 and so on, recall that "whatever% of something" is just (whatever/100)*something
thus

solve for "x", to see how much of the 15% juice will be needed
what about "y"? well, y = 5 - x