Answer:
D
Step-by-step explanation:
Hi there! The domain of a function refers to the values that can be validly input for x. In laymen's terms, domain is the x-values that exist on a graph of the equation.
If we were to plug in y=-2x+5 into a calculator that shows an infinite graph, we would see that the line of the equation would extend both ways infinitely! This means that all real numbers can be inputs for x, because for every x value that exists there is a corresponding y value.
This means that D. All real numbers, is your answer.
Hope it helps! :)
Let's use an example
Say we had two lines P and Q. If P has slope 2/5, then Q must have slope -5/2 in order for P and Q to be perpendicular.
Note how -5/2 is the negative reciprocal of 2/5. In other words, you flip the fraction and the sign to go from either slope.
Another thing to notice is that the two slopes multiply to -1. This is true for any pair of perpendicular lines as long as neither line is vertical.
Since Marco makes 10$ an hour for every dog he walks, we need to see how much money he would make per minute.
To find out how much money he makes per minute, we divide 10.00 by 60.
10.00÷60= 0.16666
Since it's an extended decimal we round it, so he makes about $0.17 per minute.
Next, we multiply 0.17 by 12, so we know how much money he makes every twelve minutes.
0.17×12=2.04
He makes around $2.04 every twelve minutes.
Since he's walking 5 dogs, we multiply 2.04 by five.
2.04×5=10.20
That means <em>he earns $10.20</em>.
I hope you have a wonderful day! :D
