What is the value of a in the equation 5 a-10b=54, when b=3

Pls brainliest will be awarded if answer is correct

For a house call, a veterinarian charges $70, plus $40 an hour. a. write an equation that represents the total fee y y (in dollars) the veterinarian charges for a visit lasting x x hours. equation: y= y= no response given b. find the x-intercept. x-intercept:

Find the slope of the line that passes through the points (0, 0) and (-2, -3). 2/3 3/2 -3/2