Answer:
The answer to your question is
a) t₁ = 6 h
b) t₂ = 3h
Step-by-step explanation:
Data
v1 = 12 mph
v2 = 24 mph
total time = 9 h
Process
1.- Write equations to solve the problem
d₁ = v₁t₁ ------------------ Equation l
d₂ = v₂t₂
d₁ = d₂ because the distance is the same in both directions
t₁ = t₁
t₂ = 9 - t₁
d₂ = v₂(9 - t₁) -------------- Equation 2
- Equal both equations
v₁t₁ = v₂(9 - t₁)
- Substitute v₁ and v₂
12t₁ = 24(9 - t₁)
- Solve for t₁
12t₁ = 216 - 24t₁
12t₁ + 24t₁ = 216
36t₁ = 216
t₁ = 216 / 36
<u> t₁ = 6 h</u>
- Calculate t₂
t₂ = 9 - 6
<u>t₂ = 3 h</u>
Answer:
D. (x,y) --> (x,-y)
Step-by-step explanation:
the x number stays the same but the y number flips to a negative.
Answer:
Step-by-step explanation:
An airplane is flying 2 miles over the ocean directly toward a coastline. If the angle of depression to the coastline from the airplane is 15 degrees, how much farther does the airplane have to fly before it is directly above the coastline? Round to the nearest tenth.
The answer should be the third option. This is because the triangle in the left is rotated. If we rotate it to the correct side, where the 4 side goes to the right, the triangle will be similar to the left one. When 2 triangles r similar, even their length is different, but the 3 angles are same to each other.
