if its 45 miles per hour then, 0.75 mile/minute.
Answer: Hello mate!
we know that p(x,y) means "Student x has taken class y"
and the used symbols are:
∃: this means "existence", you use this symbol to say that there exists at least one object that makes true the sentence.
∀: this means "for all", you use this symbol to say that the sentence is true for all the elements, then:
a) ∃x∃yP (x, y)
"exist at least one student x, that took at least one class y"
b) ∃x∀yP (x, y)
"exist at least one student x, that took all the classes y"
c) ∀x∃yP (x, y)
"every student x, took at least one class y"
d) ∃y∀xP (x, y)
"exist at least one class y, that has been taken by all the students x"
e) ∀y∃xP (x, y)
"for every class y, there is at least one student x that took the class"
f) ∀x∀yP (x, y)
"all the students x took all the classes y"
Answer:
in
Step-by-step explanation:
First you must set up an equation. 
Then, you must solve for x. 
Here are the answers to all the questions. I didn't check my answers FYI.
Answer:
B. $5.58
Step-by-step explanation:
In order to find the amount of income earned, we can set up an equation using a variable for the number of checks and the minimum balance:
Income earned = (.008)b - $0.10c - $2.00, where b = the minimum balance and c = the number of checks.
Since the customer writes 21 checks, c = 21 and maintains a minimum balance of $1,210, b = 1210, we can fill in the variables and solve the equation:
Income earned = (.008)(1210) - (0.10)(21) - 2 or 9.69 - 2.10 - 2 = $5.58
