Answer:

Step-by-step explanation:
Since Z is a quadratic function of r, then it has the general equation of a quadratic equation :
Where a, b, and c are constants
Z represent the score and r represent the rounds played.
Hope this has helped?
Answer:
a. The percentage of all taxpayers who file electronically is 58%
b. 654 people used an accountant or professional tax preparer preparing the tax return
Step-by-step explanation:
According to the given data, in order to estimate the percentage of all taxpayers who file electronically, we would have to make the following calculation:
percentage of all taxpayers who file electronically=<u>634×</u>100%=0.58
1,091
Hence, the percentage of all taxpayers who file electronically is 58%
In order to calculate how many people used an accountant or professional tax preparer for preparing the tax return, we would have to make the following calculation:
people used an accountant or professional tax preparer= <u>60%</u>×1,091=654
100%
654 people used an accountant or professional tax preparer preparing the tax return.
Y=x-4
x=y+4
y=-3(y+4)
y=-3y-12
4y=-12
y=-3
x=1