In one hour he traced the distance of: 36.15 miles
With one gallon of gas he went: 12.05 miles
;) There you go! Good Luck!
Assuming imaginary numbers aren't possible the answer would be
x < -3
otherwise
x not= -8 and 2
Answer:
12 pairs of socks
Step-by-step explanation:
74-38=36
36÷3=12
You subtract 38 from 74 to find out how much money he has left after buying the sweatshirt. You then divide that number by 3 to figure out how many pairs of socks he can buy with the money he has left.
-1 + 2 - 3 + 4 - 5 + 6 - … - 999 + 1000
= -(1 + 3 + 5 + … + 999) + (2 + 4 + 6 + … + 1000)
= -((2 - 1) + (4 - 1) + (6 - 1) + … + (1000 - 1)) + 2 (1 + 2 + 3 + … + 500)
= -((2 + 4 + 6 + … + 1000) - 500) + 2 (1 + 2 + 3 + … + 500)
= -(2 (1 + 2 + 3 + … + 500) - 500) + 2 (1 + 2 + 3 + … + 500)
Let <em>S</em> = 1 + 2 + 3 + … + 500. Then this sum is equal to
= -(2<em>S</em> - 500) + 2<em>S</em>
= -2<em>S</em> + 500 + 2<em>S</em>
= 500
and multiplying by 4 gives 2000.
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