Answer: 4
Step-by-step explanation:
First we need to find the difference of the balance.
it was -80 then it became -44. The difference is 36.
Next we divide 36 by 9 from the 9 parents.
The answer is 4
PART 1.
Going westward:
Distance: 2400 miles
Rate (this is speed): (450-wind_speed) mph
Time: distance / speed = 2400 / (450-wind speed)
Going eastward:
Distance: 2400 miles
Rate (this is speed): (450+wind_speed) mph
Time: distance / speed = 2400 / (450+wind speed)
PART 2
Formula for speed:
speed = distance / time
Now we solve this for time:
time = distance / speed
11h = 2400 / (450+-wind_speed)
+- sign is put because in one case wind increases speed of plane and in other case it decreases speed.
PART 3
To solve for wind_speed we start by rearranging formula so that we have wind_speed on left side:
(450+-wind_speed) = 2400 / 11
(450+-wind_speed) = 218mph
To fly this distance in 11h speed of plane must be 218mph.
The only way to get this solution is if we substract wind speed:
450-wind_speed = 218
wind_speed = 450-218 = 232mph
Answer:
919
Step-by-step explanation:
multiply 15 x 60 and add 19
Answer: A=bh
ans: 5/16 which is option B
Step-by-step explanation:
Answer:
The equation is:
![3(2) ^ t=1,536](https://tex.z-dn.net/?f=3%282%29%20%5E%20t%3D1%2C536)
After ![t=9\ months](https://tex.z-dn.net/?f=t%3D9%5C%20months)
Step-by-step explanation:
This situation can be represented by an exponential growth equation of the form
![y = a (b) ^ {t}](https://tex.z-dn.net/?f=y%20%3D%20a%20%28b%29%20%5E%20%7Bt%7D)
Where a is the initial amount
b is the growth rate
t is the time in months
In this case the initial amount is $ 3. Then ![a=3](https://tex.z-dn.net/?f=a%3D3)
if she initially saves $3 and plans to double the amount she saves each month then
![b=2](https://tex.z-dn.net/?f=b%3D2)
The bike Jane wants is $1,536 at the local bike shop.
Then ![y=1,536](https://tex.z-dn.net/?f=y%3D1%2C536)
The equation is:
![3(2) ^ t=1,536](https://tex.z-dn.net/?f=3%282%29%20%5E%20t%3D1%2C536)
Now we solve the equation for t
![3(2) ^ t=1,536](https://tex.z-dn.net/?f=3%282%29%20%5E%20t%3D1%2C536)
![(2) ^ t=\frac{1,536}{3}](https://tex.z-dn.net/?f=%282%29%20%5E%20t%3D%5Cfrac%7B1%2C536%7D%7B3%7D)
![(2) ^ t=512](https://tex.z-dn.net/?f=%282%29%20%5E%20t%3D512)
![log_2(2) ^ t=log_2(512)](https://tex.z-dn.net/?f=log_2%282%29%20%5E%20t%3Dlog_2%28512%29)
![t=log_2(512)](https://tex.z-dn.net/?f=t%3Dlog_2%28512%29)
![t=9\ months](https://tex.z-dn.net/?f=t%3D9%5C%20months)