Answer:
x > 17.5
Step-by-step explanation:
So we are given that; 
=> First multiply 7 on each side of "="
4x = 70
=> Now divide 4 on each side
=> x > 17.5
Hope this helps!
Question 18
The answer is 4 days.
Because,
Kevin =3×n
Anita =4+ (2×n)
Equating the two equations.
3n=4+2n
3n-2n=4
n=4
Question 19
When the solution is (4,1), it means the value of y=1 and x=4.
The answer is;
y=x-3
y=-3x+13. Since when the values of x and y are substituted they satisfy the system.
Question 20
The system has no solution.
This is because the line are parallel and they do not intersect to give a solution.
Answer: The mean of the data will decrease.
The median of the data will not change.
The range of the data will decrease.
The answer would be x equals 7
I have no idea she got it wrong the real answer is 5
