Answer:
rational numbers are numbers that can be written as the ratio of two integers
Answer:
x = 3; y = -6
Step-by-step explanation:
x - 2y = 15
2x + 4y = -18
Multiply both sides of the first equation by 2. Write the second equation below it, and add the two equations.
2x - 4y = 30
(+) 2x + 4y = -18
---------------------------
4x = 12
4x/4 = 12/4
x = 3
Now we substitute 3 for x in the first equation and solve for y.
x - 2y = 15
3 - 2y = 15
-2y = 12
y = -6
Answer: x = 3; y = -6
1 ≤ 3 - x
x + 1 ≤ 3 <em>added x to both sides</em>
x ≤ 2 <em>subtracted 1 from both sides</em>
Number line: ←----------------------·2 (fill in the dot at 2 since it is "equal to")
Interval Notation: (-∞, 2]
The farmer sends 15 pounds to the local market.
F(10) means they want you to plug in 10. The piecewise function tells you that when x is greater or equal to 3, you use 6-2x. What I am saying is that since the number you want to plug in is greater than 3, then you plug in 10 into 6-2x.
f(10)=6-2*10=-14
