Answer:
number 7 is D i believe
Step-by-step explanation:
Answer:
d=2
Step-by-step explanation:
As we know the formula for arithmetic sequence
from the fromula, we can see the difference is 2.
Hence
We need to find thr rate of change (slope) of the line joining these two points ~
Slope of the line (m) joining the two points is 2 ~
Answer:
7
Step-by-step explanation:
3x-6 = x+4 + 4
3x-x = 4+4+6
2x = 14
x= 7
Answer:
The speed of the submarine is 5 mph
Step-by-step explanation:
Let x represent the speed of the submarine.
A submarine left Hawai'i 2 hours before an aircraft carrier. If the aircraft carrier travelled for 9 hours and after this time, the vessels were 280 miles apart, it means that submarine travelled for 9 + 2 = 11 hours and the total distance covered by submarine and the aircraft is 280 miles.
Distance = speed × time
Distance covered by the submarine would be
11 × x = 11x
The aircraft carrier traveled at 25 mph. Distance covered by the aircraft would be
25 × 9 = 225
Therefore,
225 + 11x = 280
11x = 280 - 225 = 55
x = 55/11 = 5mph