8x + 3y = 20.50
-
4x+5y=22.50
=
4x-2y=-2, so you have to divide each number by 2, then
2x-y=-1, so
-y=-1-2x /-1, y=1+2x, then replace it with one original equation like the first one for instance:
8x+3(1+2x)=20.50, then
8x+3+6x=20.50, then
14x=20.50-3
14x=17.5
x=1.25, then solve y:\
y=1+2*(1.25)
y=1+2.5
y=3.5,
So answer is x=1.25, and y=3.5
Answer:
Step-by-step explanation:
It is hard for me to read but you take the weight times the cost per pound to find out how much
IF you buy potatoes 6.3 pounds times $7.56 a pound = $47.63 total
but IF its 6.3 pound at a total cost of $7.56 you divide to find the per pound price. $7.56 ÷ 6.3 pounds = $1.20 a pound.
to check this you take your answer $1.20 times the number of pounds bought 6.3 = $7.56
Answer:
height of tress is 20 feet
Step-by-step explanation:
because tan = perpendicular/ height
we see option only 20 feet satisfy it
Answer:
11.4
Step-by-step explanation:
You find the square root
