10-20=10so the answer and 10-9=1 so that's the answer
Answer:
15i and 4i
Step-by-step explanation:
i is an imaginary number also shown as
.
Since we have 
, thats 15* . Substitute for i and we get 15*i or 15i.
We do the same for 
. This is 4* or 4*i or 4i.
An easy way to do this is to take the negative inside the square root like 
, take the absolute value -6 absolute value=6 and times it by i. So now it becomes 6i
Answer: A = 14 units2
Step-by-step explanation: Please look at the image below!
Answer:
10
Step-by-step explanation:
You can see that both triangles are the same except for one thing: one is smaller. Since 7 is half of 14 and both triangles are similar, x stands for 10. That is because 10 is half of 20! :D
Given that the tornado traveled 260 miles in 4 hours, its initial speed is 65 mi/h. Then, slowing by 20% every hour, the speed after 2 hours can be calculated through the equation,
speed = (65 mi/h) x (1-0.2)^2
speed = 41.6 mi/h
Thus, the speed of the tornado after 2 hours is approximately 41.6 mi/h.
