2 - 0.002= 1.998
hope this helps
Answer:
(y - 7)/(8 - 6) = 3
(y - 7)/2 = 3
y - 7 = 6
y = 13
Step-by-step explanation:
Let, that number = x
It would be: x * 25% = 21
x * 0.25 = 21
x = 21 / 0.25
x = 84
In short, Your Answer would be 84
Hope this helps!
Answer:
decreasing at 390 miles per hour
Step-by-step explanation:
Airplane A's distance in miles to the airport can be written as ...
a = 30 -250t . . . . . where t is in hours
Likewise, airplane B's distance to the airport can be written as ...
b = 40 -300t
The distance (d) between the airplanes can be found using the Pythagorean theorem:
d^2 = a^2 + b^2
Differentiating with respect to time, we have ...
2d·d' = 2a·a' +2b·b'
d' = (a·a' +b·b')/d
__
To find a numerical value of this, we need to find the values of its variables at t=0.
a = 30 -250·0 = 30
a' = -250
b = 40 -300·0 = 40
b' = -300
d = √(a²+b²) = √(900+1600) = 50
Then ...
d' = (30(-250) +40(-300))/50 = -19500/50 = -390
The distance between the airplanes is decreasing at 390 miles per hour.
