We know the slope of this line is 1/3x, which means the slope of the line that is perpendicular to it is -3x
A slope that is perpendicular to another is the negative reciprocal of the other.
The equation of a line that is perpendicular to the line y = 1/3x - 5 is y = -3x - 5
To find the sales tax you’d need to find 9% of 87. You find this by using this template, x%/100%=y/z, x being the sales tax, y being 9% in cash, and z being the 87 dollars. You multiply the x value by the z value, (9 X 87=783) and then divide that product by 100%. This gives you the sales tax of 7.83, and when you add that to 87 you get $94.83. Subtract that from the 5 20 dollar bills ($100) and you are left with $5.27 change.
It took him 9.92 hours to complete the journey.
Step-by-step explanation:
Given,
Distance traveled = 50 miles
Distance traveled on horse = 
Distance traveled on foot = 25 miles
Speed while riding = 9 miles per hour
Distance = Speed * Time
Time while riding = 
Time while riding = 
Speed while waling = 3.5 miles
Time = 
Total time = 2.78+7.14 = 9.92 hours
It took him 9.92 hours to complete the journey.
Keywords: speed, distance
Learn more about distance at:
#LearnwithBrainly
Answer:
90 points
Step-by-step explanation:
90 x .80 = 72 points
