Answer:
x=10,y=5,z=2
Step-by-step explanation:
x+15=2x+5
x=10
4y=8y-20
4y=20
y=5
10z-5=3z+9
7z=14
z=2
B. 33 pepperoni and 20 ham slices
D. 43 pepperoni and 25 ham slices
Answer:
The average salary of all workers could be any number between $37,596 and $45,500.
Step-by-step explanation:
It is given that according to the Bureau of Labor and Statistics in 2014,
Average salary of all female workers = $37,596
Average salary of all male workers = $45,500
In given problem the options are missing.
Here, the number of male and female are not given, so we can not find an exact average salary of all workers. But the average salary of all workers must be lies between the average salary of male and female.
Therefore. the average salary of all workers could be any number between $37,596 and $45,500.
Answer:
4
Step-by-step explanation:
1+1+1+1=4
Answer: It is usefull.
Step-by-step explanation:
The regression squared talks to us about how well the model fits in the experimental data, where 0.0 means that the model does not fit at all, and 100% means that the model fits perfectly.
This is always true? well, really not, there are cases where you can have a regression square of 0.98, which would imply that the model is correct, but when you see the residual vs fit the plot, you may see some pattern, which implies that there is a problem with the model (you always expect to see randomness when you look at this graph). While for a prediction, this actually may work (at least in the range of the data points, outside this range the model and the data may not coincide at all)
Now, it still is useful in a certain range, so we can actually conclude that if R^2 = 0.949 represents a model that is useful for predicting the exam marks.
