Answer:
The distance the marina can travel =
= 48 miles
Step-by-step explanation:
The rate going out against the current is = u - v = 20 
The rate going out with the current is = u + v = 30 
Let the distance traveled by the motorboat = 
Total time the boat can travel = 4 hours
⇒ Total time = ( Time taken by boat to go against the current ) + ( Time taken by boat to go with the current )
⇒ 4 = 
⇒ 4 = 
⇒ 4 = 
⇒
= 48 miles
This is the distance the marina can travel.
The answer is <span>12^2=x^2+8^2-16x(cos(72°) </span>
<span>x^2-4.9443x=80 </span>
<span>(x-2.4721)^2=86.1115 </span>
<span>x-2.4721=±9.2796 </span>
<span>x=11.7517 </span>
<span>B=72°, b=12, c=8, a=11.8 </span>
<span>C=arcsin(8/12*sin(72°))=39.3° </span>
<span>A=68.7° </span>
It is 5! Hope I can help! :)
For x = ay - bz:
Add bz to both sides:
ay = x + bz
Divide a on both sides:
y = (x + bz)/a
For xy + yz = 10:
Distribute y from the left side:
y * (x + z) = 10
Divide by x + z:
y = 10/(x + z)
For (ab - ac)/z = x:
Multiply by z on both sides:
ab - ac = xz
Take out a from the left side:
a * (b - c) = xz
Divide by b - c on both sides:
a = xz/(b - c)
Answer:
150:120
Step-by-step explanation:
U add the 2 ratios 5+4=9
270/9=30
30*5=150
30*4=120