14 + 28 + 42 + 56 + … 280
= 14 (1 + 2 + 3 + 4 + … + 20)
= 14 × 20 × 21 / 2
= 2940
where we use the well-known identity,
A cannot be the answer.
The maximum distance he can travel is 420 miles. He has gone 180. He still has 420 - 180 = 240 miles left to go.
C The distance is correct in the first set of brackets, but you cannot add distance divided by time (which is a speed) to distance.
D is incorrect. The first set of brackets is correct, but the second set is meaningless. Distances and rates do not mix.
B <<<<< Answer If you divide the remaining distance (240) by the rate (180/3) you get the correct answer of 4 hours.
B <<<< answer.
The word "triangle" came into use in Late Middle English directly from the Latin "triangulus" by dropping the Latin "us" ending.
Triangulus is a compound word made of two Latin words.
<span>Tri, is a prefix form of tres, which means three (3)<span>Angulus, meaning corner.</span></span>
2(-1)+3
-2+3
1
The answer is C!
