Grace are in $7 dollars for each car she washes she always saves $20 of her weekly earnings this week she wants to have at least $67 in spending money how many cars machine wash enter and solve any quality to represent the situation into your value as a simplified mixed number if necessary

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.