It’s A) simplify it you’ll get -42 because a negative times a positive is an negative
The 3r would be the independent variable and m=30 is the dependent variable. Double check the answer though.
Answer:
x ∈ (-∞ , -2) ∪ (1, 3)
Step-by-step explanation:
The expression is already factored. Note that for the polynomial that appears in the numerator
there are 2 roots:

For the polynomial that appears in the denominator there is 1 root:

Note that
does not belong to the domain of f(x) because it zeroes the denominator of the function and the division between zero is not defined.
With these three roots we do the study of signs to find out when
Observe the attached image
Note that:
when
when 
when 
Finally, we have the solution:
x ∈ (-∞ , -2) ∪ (1, 3)
Answer:
60
Step-by-step explanation:
the 6 in 7639 has a value of 600
600/10 = 60