What is the location of the sum 11+(-5) with respect to 11 on a number line?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.