Answer: 
Step-by-step explanation:
Given: Distance traveled by Smith =
mile.
Time taken =
hour
Unit rate in miles per hour = ( Distance traveled by Smith) ÷ (Time taken)


Unit rate = 
Answer:
(a)
Step-by-step explanation:
x + x(xx)
Put the value of x = 2 in the above expression we get,
2 + 2(22)
= 2 + 2(2 × 2)
= 2 + 2(4)
= 2 + 8
= 10
Answer: (a)
Answer:
There are 8 males in the class and 42 females.
Step-by-step explanation:
This question can be solved using a system of equations.
I am going to say that:
x is the number of females.
y is the number of males.
Class of 50 students
This means that 
The number of females is 2 more than 5 times the number of males.
This means that 
So, finding y, the number of males:





Females:

There are 8 males in the class and 42 females.
4x+16=-2
Subtract 16 from both sides
4x=-18
Divide both sides by 4
x=-18/4
x= -9/2
Final answer: x=-9/2