Answer: under y = 1/2x +2 you have (4,4) and (2,3)
Under y = 3x - 4 you have
(3,5) (5,11) and (6,14)
Step-by-step explanation: Try the numbers in the equations given. The first number replaces x, the second number replaces y.
X = number of flyers
50+0.05x=100
0.05x=50
x=1000 flyers
Answer:
y=-1/2x+4
Step-by-step explanation:
hope this helps:)
Answer:
The second one-
Step-by-step explanation:
Answer:
- x +y = 500
- 0.65x +0.95y = 0.75(500)
- solution: (x, y) = (300, 200)
Step-by-step explanation:
A system of equations for the problem can be written using the two given relationships between quantities of brass alloys.
<h3>Setup</h3>
Let x and y represent the quantities in grams of the 65% and 90% alloys used, respectively. There are two relations given in the problem statement.
x + y = 500 . . . . . . quantity of new alloy needed
0.65x +0.90y = 0.75(500) . . . . . quantity of copper in the new alloy
These are the desired system of equations.
<h3>Solution</h3>
This problem does not ask for the solution, but it is easily found using substitution for x.
x = 500 -y
0.65(500 -y) +0.90y = 0.75(500)
(0.90 -0.65)y = 500(0.75 -0.65) . . . . . . subtract 0.65(500)
y = 500(0.10/0.25) = 200
x = 500 -200 = 300
300 grams of 65% copper and 200 grams of 90% copper are needed.