Answer:
a=4 and b=-1
Step-by-step explanation:
2(4)+3(-1)= 5
2/3x +12/3 =7
2/3x + 4 =7
2/3x=7-4
2/3x=3
x=3*3/2
x=3
10y + 70= 12y
12y-10y=70
2y=70
y=70/2=35
A represents the speed of the aircraft.
b represents the speed of the bus.
a=2b-5
114/b=218/a
Substitution method
114/b=218/(2b-5)
(2b-5)*(114/b)= 218
(228b-570)/b = 218
228b-570= 218b
228b-218b=570
10b= 570
b=57
Plug the value of b into one of the original equations.
a=2(57)-5
a=114-5
a=109
Final answer:
Average speed of plane= 109
Average speed of bus= 57
Answer:
the flagpole is 12 ft
Step-by-step explanation:
2.5 ft / 4 ft = 7.5 ft / x ft
2.5x = 30
2.5x/2.5 = 30/2.5
x = 12 ft
