Answer:
Basically when you use parantheses it protects that number from becoming negative...
-10^2 is -100 but with paranthesis is 100
The measure of the smaller angle is 64°.
Yes they are because if they connect they make that big triangle :) if its wrong im sorry :(
Answer:
c.
Step-by-step explanation:
* To make this simpler, reduce these two fractions in lowest terms.
I am joyous to assist you anytime.
Speed of the boat = u
speed of the current = v
in downstream,
u - v = 105/5
u - v = 21
in upstream
u + v = 105/7
u + v = 15
add both equations
2u = 36
u = 18
v = -3
so
speed of the boat = 18 km/h
speed of the current = 3 km/h