Average speed of cyclist = x
average speed of car = 3x
x = 225/5
x = 45km/h
3x = 3(45)
3x = 135km/h
average speed of cyclist = 45km/h
average speed of car = 135km/h
Answer:
x=10, y=-5
Step-by-step explanation:
2x+3y=5, y= 5-x; change y to 5-x:
2x+3(5-x)=5
2x-3x+15=5
-x=5-15
-x=-10
x=10
=>y=5-x=5-10=-5
Answer:
x = -1.5625
Step-by-step explanation:
Solve for x:
-8 x - 12.5 = 0
Add 12.5` to both sides:
(12.5 - 12.5) - 8 x = 12.5
12.5 - 12.5 = 0:
-8 x = 12.5
Divide both sides of -8 x = 12.5 by -8:
(-8 x)/(-8) = 12.5/(-8)
(-8)/(-8) = 1:
x = 12.5/(-8)
12.5/(-8) = -1.5625:
Answer: x = -1.5625
Y = -3x + 13
Steps and the graph are on paper
Answer:
66 inches
Step-by-step explanation:
1. Yards to Feet:
1 yard= 3 feet
(6 yards)(3)= 18
6 yards = 18 feet
2. Number of Groups:
30 students/6 students per group= 5 groups
3. Total String Needed:
(5 groups)x(2.5 feet string)= 12.5 feet total string
4. Remaining String:
18 feet-12.5 feet= 5.5 feet
5. Feet to Inches:
1 foot= 12 inches
(5.5 feet)(12)= 66 inches
66 inches of string will remain
