Question

If I start out making $15 dollars a day, and my pay is increased by $0.75 a day, how much money will I have at the end of the month? (31 days)?

Answer 1

It's 0.75 ADDED to the INCREASED amount! Which means I start out with 15, then on to 15.75, then on to 16.50, and so on!

Answer 2

15,15.75,16.5,...

An=a1+r.(n-1)
Sn=(a1+an).n/2

The final answer is: 813,75

Answer 3

Whoa... are you sure??

Answer 4

Yes. Do you not have the answer?

Answer 5

No :(

Answer 6

I do It by arithmetical progression. I would say that this is right, but i'm not a teacher, hehehe.

Answer 7

OOOH wait, is that supposed to be a decimal point?

Answer 8

Oh sorry. I misread it. You're right.

Answer 9

Wait shouldn't it be 922.25?

Answer 10

The final answer is: 813.75

Yes, It is a decimal point, i'm brazilian and we use "," in place of ".".

Answer 11

Why?

Answer 12

I added 15 increasing 1, 31 times lol http://www.wolframalpha.com/input/?i=15%2B16%2B17%2B18%2B19%2B20%2B21%2B22%2B23%2B24%2B25%2B26%2B27%2B28%2B29%2B30%2B31%2B32%2B33%2B34%2B35%2B36%2B37%2B38%2B39%2B40%2B41%2B42%2B43%2B44%2B45

Then I multiplied .75 by 31, which is 23.25, then I subtracted that by the total amount of 930, which is 906 (i messed up)

Answer 13

Or am I completely wrong? I admit I have no idea what I'm doing

Answer 14

I multiplied .75 by 31 to deduct it from the dollar

Answer 15

No, It's like the compound interest.

The first is 15, the second ir 15,75, the third is 16,50.

Answer 16

Thank you!

Answer 17

It's a arithmetical progression.