Answer:
The pattern is of +5,+10,+20,+40
As 7+5=12
12+10=22
22+20=42
So the next three numbers are
42+40=82
82+80=162
163+160=323
Answer:
Step-by-step explanation:
let the speed of stream=x mi/hr
then (3+x)t=5
and (3-x)t=0.5
or
3t+xt=5
3t-xt=0.5
add
6t=5.5
t=5.5/6 hr
(3+x)t=5
3+x=5/t=5×6/5.5=6/1.1
x=6/1.1-3=(6-3.3)/1.1
x=2.7/1.1 /approx 2.45 miles/hr
Answer:
120°
Step-by-step explanation:
30° + 90° = 120°
180°-120°= 60°
180°-60°=120°
-8x-4y=-20
-2x-y=-5
y=-2x+5
1 solutions
2x-5=-2x+5
4x=10
X=2.5
