Answer:
5 (5x1) , -10 -(5x2), 20(10x2), -40 -(20x2), 80(40x2)
so the next number should be previous number in the sequence multiplied by 2 and a negative sign.
-`(80x2) = -160
Answer:
3 miles and then 3 per mile for each additional mile
Answer:
need more information
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
Let p represent # of physics texts sold
Let m represent # of maths texts sold
Therefore we have p = m - 60 | because physics texts sold are less than maths by 60
Total sold = 206 = m + p | recall that p = m - 60
We then have 206 = m + m - 60
206 = 2m - 60 | adding 60 to both sides, we have
206 + 60 = 2m | dividing both sides by 2
266/2 = 2m/2
Therefore, m = 133 texts
and p = m - 60 = 133 - 60 = 193
