Yes because zeros have no value if they are after a decimal and have no number behind them
140 = (7/15)x
140/(7/15) = x/(7/15)
300 = x
The elevation change of the Wild Cave tour is 300ft.
Answer:
x = 15 or x = -19
Step-by-step explanation:
ΔPQR similar to ΔSQT
SQ / QP = ST / PR
8 / 8+x+5 = x-9 / 21
8 / 13+x = x-9 / 21
(x+13)(X-9) = 168
x² + 4x - 117 = 168
x² + 4x - 285 = 0
(x - 15) (x + 19) = 0
x = 15 or x = -19
I know you're using Khan Academy, anyway the answer is 135 mate.
That would be on the 5th week. There were 18 students that attended (D.)
Hope this helped!
