Step-by-step explanation:
pythagoras theorem: c²=a²+b²
Where c= longest side of a right angle triangle
AB= 6+r = c
AD= 12 =a
CD= r =b
(6+r)² = 12²+ r²
36+12r+r² =144 +r²
12r+r²-r²=144-36
12r=108
r= 108/12
r=9
Answer:
50 mph
Step-by-step explanation:
80 mph x 4 = 320 miles. so the first car went 320 miles
520 miles apart- 320 = 200 I subtracted the 320 miles so i can figure out how far the other car went.
200 / 4 hours = 50 mph
Answer:
1 hour and 7.5 minutes or 67.5 per day will help him reach his goal of 9 hours per 8 days.
Step-by-step explanation:
9 hours
- 8 days
________
8 hours
1 hour left
1 hour is 60 minutes and 60/8 is 7.5 so each day will have added to it 7.5 minutes wish makes the answer 1 hour and 7.5 minutes or 67.5 minutes.
Text me off of here ................
7% of 79.99 is (rounded) 5.60 so the total cost would be $85.59
