Determine the equation of the line perpendicular to the line 4x+2y-7=0

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

What is the reflection image of (5,-3) across the line y = -x?