45 45 90 triangle
a = 9√2 / √2
a = 9
answer
a = 9
Answer:
-12
Step-by-step explanation:
What you have to do is plug -4 into the function as a puzzle. So, replace all x with -4.
f(-4) = 7(-4) - 4(-4) = -28 + 16 = -12
4-2 is 2
and 5-3 is 2
when you add or subtract fractions, you don't change the denominator (bottom number in fraction)
so the answer is 2 2/8
Answer:
1) yes
2) No
3) No
4) yes
5) No
Step-by-step explanation:
1) f(0)=0, f(1)=1, f(2)=2, f(3)=3, then ![f[\{0, 1, 2, 3\}]=\{0, 1, 2, 3\}](https://tex.z-dn.net/?f=f%5B%5C%7B0%2C%201%2C%202%2C%203%5C%7D%5D%3D%5C%7B0%2C%201%2C%202%2C%203%5C%7D)
2) f(0)=0, 
, then f(1)=1; 
, then f(2)=0; 
, then f(3)=1
Then ![f[\{0, 1, 2, 3\}]=\{0, 1, 3\}](https://tex.z-dn.net/?f=f%5B%5C%7B0%2C%201%2C%202%2C%203%5C%7D%5D%3D%5C%7B0%2C%201%2C%203%5C%7D)
, this means that f isn't onto.
3.
, then f(1)=0
, then f(2)=2
, then f(3)=2
Then ![f[\{0, 1, 2, 3\}]=\{0, 2\}](https://tex.z-dn.net/?f=f%5B%5C%7B0%2C%201%2C%202%2C%203%5C%7D%5D%3D%5C%7B0%2C%202%5C%7D)
, this means that f isn't onto.
4. ![f[\{0, 1, 2, 3\}]=\{0, 1, 2,3\}](https://tex.z-dn.net/?f=f%5B%5C%7B0%2C%201%2C%202%2C%203%5C%7D%5D%3D%5C%7B0%2C%201%2C%202%2C3%5C%7D)
, then f is onto.
5. ![f[\{0, 1, 2, 3\}]=\{1, 2\}](https://tex.z-dn.net/?f=f%5B%5C%7B0%2C%201%2C%202%2C%203%5C%7D%5D%3D%5C%7B1%2C%202%5C%7D)
, this means that f isn't onto.
