Math Is Fun Forum

Jesse Pak

Guest

help please.

:Di need help on these two questions, can somebody help me?

1.) A change purse contains 20 coins consisting of nickels and dimes and having a total value of $1.40. How many nickels are there?

2.) Use absolute value and the variable x to write an open sentence that specifies numbers on a number line whose distance3 from -2 is at least 3.

please help, i would be more than happy if you give me the answer with the steps. I need to show my work.

pi man

Member

Registered: 2006-07-06

Posts: 251

Re: help please.

Let N = the number of nickles.   Then 20-N = the number of dimes.

.05N + .10 (20-N) = 1.40    (5 cents * the number of nickles plus 10 cents * the number of dimes)
.05N + 2.0 -.10N = 1.40
.60 = .05N
N = 12

Therefore you have 12 nickles (60 cents) and 8 dimes (80 cents).

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: help please.

3 is less than the absolute value of the sum of x and 2.

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