The first one is false. Functions can also be other shapes, like parabolas or exponential.
The second is true. If x is 2 then y is also 2.
Answer:
(−∞,∞). no solution
Step-by-step explanation:
Assuming you mean y=10x+150 and y=20x+115, you need to use a simultaneous equation, because you have two equations with two unknowns (x and y)
rearrange so
10x-y=-150
20x-y=-115
multiply the top by -1, so that if we add the two lines together, the y will cancel out
-10x+y=150
20x-y=-115
add the two lines together
10x=35
x=3.5
so the time is 3 and a half weeks
then we can sub in x to find y
20x-y=-115
20(3.5)-y=-115
70-y=-115
-y=-185
y=185
so 185 tickets were sold !
you can sub these values into your original equations to check your answer :)
i think its (x , y) -> (x + 9, y - 9)
Answer:
The solution of the equation f (x) = g (x) is the same as the coordinates of the intersection.
Exaple in the attachment.
f(x) = g(x) → x = -2, y = -1 or x = -1 and y = 0 or x = 1 and y = 2.