Answer: the speed of the plane is 300 miles per hour
The strength of the tail wind is 400 miles per hour
Step-by-step explanation:
A tail wind travels in the direction of the airplane. It took the plane 3 hours to travel 2100 miles with a tail wind.
Speed = distance / time
The speed of the airplane while travelling with the tail wind is
2100/3 = 700 miles per hour.
It took the plane 7 hours to make the return trip against the wind. This means that the plane travelled the same distance of 2100 miles back in 7 hours.
The speed of the plane while travelling back would be
2100/7 = 300 miles per hour
The speed of the wind would be
the speed while it was flying with the tail wind - the speed when it was flying against the tail wind . it becomes
700-300 = 400 miles per hour
⇒ Start with equality property
⇒ Using the subtraction/addition property to subtract 2 from both sides
⇒ Using the multiplication property (multiply both sides by 6)
x = 78
Answer:
Just match values.
At 1 hour you have 60 degrees
At 2 hour 65
At 3 70 degrees
At 4 75 degrees
As You can see the temperature varies by 5 degrees
Answer:
4b -11 = 1 -2(3-b) (use the distributive property on -2(3-b))
4b -11 = 1 -6 +2b ( combine like terms on the right side of the = sign)
4b -11 = -5 +2b (subtract 2b from both sides)
2b -11 = -5 (add 11 to both sides)
2b = 6 (divide each side by 2)
b= 3 ( so, your answer is C)