Answer:
f(x)=xy3 -4xy2 -7x+10
Step-by-step explanation:
the xy3 and xy2 means x to the 3rd power and x to the second power
I am unsure about the very last problem but I can help with the first two
1) (y+1)+4
If we combine the numbers 1 and 4, we get +5 and can isolate the numbers from the variable.
This would give us

2) (6*r)*7
remember that we do not have to explicitly state 6*r
Instead, we can write it as 6r
this helps us get rid of the parentheses
now we can write it as

I hope this helps!:)
Mode 17,
Mean is 19.3
Median 18.
Answer:
3/4
Step-by-step explanation:
Answer: total cost is $13
Step-by-step explanation: