What is the sum of the first twenty terms of the two-times-table (in other words, the sum of the first twenty terms of the sequence 2×1, 2×2, ...)?

answer: it's a

step-by-step explanation:

the correct answer would be:

220 centimeters

to get this you can use the pythagorean theorem

hope this

step-by-step explanation:

1. 2

2. 11

3. 5

4. 6

5. 7

6. 5

7. -1

8. 1

step-by-step explanation:

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.