Answer: Stellas rate per minute is 30 words per minute
Step-by-step explanation:
Answer:
is one to one mapping, it is not onto mapping
Step-by-step explanation:
![f_{1} :Z \rightarrow Z\\ f_{1} (x) = x^{3}](https://tex.z-dn.net/?f=f_%7B1%7D%20%3AZ%20%5Crightarrow%20Z%5C%5C%20f_%7B1%7D%20%28x%29%20%3D%20x%5E%7B3%7D)
f₁(x) is one to one mapping
Let ![x, y \epsilon Z](https://tex.z-dn.net/?f=x%2C%20y%20%5Cepsilon%20Z)
f₁(x) = f₁(y):
x₁³ = y₁³
f₁(x) is not onto mapping
Example: If f₁(x) = 7,
x₁³ = 7
![x_{1} = \sqrt[3]{7}](https://tex.z-dn.net/?f=x_%7B1%7D%20%3D%20%5Csqrt%5B3%5D%7B7%7D)
x₁ is not an element of Z
is one to one mapping, it is not onto mapping
Answer: 10.5 : 20.2
Step-by-step explanation:
If you multiply the top equation by -2 you get:
-4x -14y = 14 => -4x = 14+14y
now you can plug in the -4x into the second equation:
14+14y - 3y = -19 => 11y = -33 => y=-3
Fill in y=-3 in either equation to find x:
2x - 21 = -7 => 2x = 14 => x=7
So your ordered pair is (7,-3)