Question

Your piggy bank has a total of 18 coins in it; some are dimes and some are nickels. If you have a total of $1.40, how many nickels do you have? 

14 
12
 10 
8

Answer 1

I got 8

Answer 2

x+y =18
5x+10y = 140

Answer 3

8 looks right to me

Answer 4

@ankit042 it would be helpful if you taught, rather than give the answers away.

Answer 5

Can I have help with another

Answer 6

@calculusfunctions I think I gave the equations....by that time she herself got the answer, I believe she just wanted to crosscheck

Answer 7

An airplane flew 3.5 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air.

 240 mph 
220 mph 
200 mph
 180 mph

Answer 8

Yes I wasnt sure of the answer

Answer 9

@ankit042 do u get this?

Answer 10

any idea how to start @shannon342 ?

Answer 11

First determine your two unknowns. What do you think they will be here?

Answer 12

When I did it I got 240mph but I thought it didnt look right im sorry im not a person that goes with my first instinct

Answer 13

I'm not interested only in the final answer. As a teacher, I would like to teach you you how to solve math problems so that you can have the proper tools and confidence. Are you interested in learning or do you just care about the final answer? @shannon342 ?

Answer 14

I just wanted to learn how to do it so I wont have trouble with the answers ..........

Answer 15

Alright then, let's learn, shall we? Now please answer my initial question. What do you think the two unknowns are?

Answer 16

If you're uncertain, tell me. But at least give it a try. Never be afraid of being wrong, as being wrong is part of learning.

Answer 17

Well @shannon342 do you know? Oh I see you just go away without even saying anything. That's pretty rude!

Answer 18

Um I had some problem with open study ut was lagging so im not rude just a student wanting help if u dont wanna help me thats fine but im not rude

Answer 19

Thanks @calculusfunctions