In your statement of the quantities, I don't see the word "equals" anywhere. Without that,
all you have is an expression that stands for a number. The number depends on the values
of 'x' and 'y', and it changes as soon as one of them changes. You don't have an equation,
no question is asked, and no answer is required.
3
all real numbers
No
domain = set R ,, all real numbers
It equals a nonsense. Some of the measures are areas in 2-dimensional space while others are measure of volume in 3-dimensional space. According to basic principles of dimensional analysis, combining them together is not valid.
2y + 1
This expression factors as x -1 quantity squared.
3
68.3
The square root of ( a squared plus b squared ), quantity divided by a, where a is the length of the semi-major axis and b is the length of the semi-minor axis.
The square root of ( a squared plus b squared ), quantity divided by a, where a is the length of the semi-major axis and b is the length of the semi-minor axis.
all real numbers
No, it is not.No, it is not.
104
The square root of ( a squared plus b squared ), quantity divided by a, where a is the length of the semi-major axis and b is the length of the semi-minor axis.
3a squared plus nine = 19a. 3a to the second power = 9a plus 9 = 19a.
No