Answer: it takes 5s for each plane to travel their respective distances
Step-by-step explanation:
Let a = speed of plane A
Let b = speed of plane B
b = 55 + a
Time for plane A to fly 4000 miles
= 4000/a
Time for plane B to fly 4275 miles
= 4275/b
Since it takes same amount of time
4000/a = 4275/b
4000b = 4275a-------1
Put b = 55+a in eqn
4000(55+a) = 4275a
220000+4000a = 4275a
275a = 220000
a = 800
b = 55 +800 = 855
Time for plane A to fly 4000 miles
= 4000/800 = 5s
Time for plane B to fly 4275 miles
= 4275/855= 5s
Answer:
y = -2x - 1
Step-by-step explanation:
pt slope formula is
y-y₁=m(x-x₁)
First put values in
y--5=m(x-2) (you could used either point, I chose the first one out of the two)
Then find the slope
-1+5/0-2
4/-2
-2
y+5=-2(x-2)
solve
y+5=-2x+4
y=-2x-1
Answer:
2. Dependent events
Step-by-step explanation:
Answer:
For the question on the right, I assume b is the exponential factor, or growth factor.
Step-by-step explanation:
Linear:
You can find the equation by using two points and the equation for a line.
Exponential:
Answer:
32=3⋅3=9
We said that 9 was the square of 3. The square of -3 is 9 as well
(−3)2=(−3)⋅(−3)=9
Step-by-step explanation: