Step-by-step explanation:
You can't use quadratic formula in this
Answer:
Step-by-step explanation:
<UWV = 180° - 50° - 50° ( SUM OF ANGLE IN A TRIANGLE)
<UWV = 80° which is angle A
b = 20 ( isosceles triangle)
Answer:
notice what it says at the top got to you tube if you need help
Step-by-step explanation:
The cupons help get the thing for less.
Going upstream: 432 km / 6 hours = 72 km/h
Going downstream: 384 km / 4 hours = 96 km/h
Going upstream against the current means that the effective speed is:
r_boat - r_current = 72
Meanwhile, going downstream with the current means;
r_boat + r_current = 96
Adding both equations (to cancel out r_current) gives:
2r_boat = 72 + 96
r_boat = 84 km/h
Substituting back into one of the original equations: r_current = 12 km/h.