Write the equation y=1/2x+2. (0,4) in perpendicular form

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?