Answer:
Part A: this equation can only have 1 solution.
Part B:
3(2x - 7) = 3
⇔ 6x - 21 = 3
⇔ 6x = 3 + 21
⇔ 6x = 24
⇔ x = 24/6 = 4
10 / 1 is a rational and which is equal to 10 so 10 is also a rational number
Step-by-step explanation:
Area=9π
r=3
Circumference=6πcm
Step-by-step explanation:
let number of brand new busses = x
let number of secound hand busses = y
from first condition
x + y = 20
x = 20 - y
cost of brand new busses = 8000x
cost of scount hand bus = 3500y
8000x + 3500y = 160000
8000( 20 - y ) + 3500y = 106000
160000 - 8000y + 3500y = 106000
-4500y = -54000
y = 12
x = 20 - y
x = 8