Kayjay1999 Kayjay1999

12-07-2016
Mathematics

contestada

A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?

Respuesta :

Аноним Аноним

12-07-2016

9 Nickels, 8 Dimes...here is how i work it out!

d + n = 17
0.1d + 0.05n = 1.25

d = 17 - n
0.1 (17 - n) + 0.05n = 1.25
1.7 - 0.1n + 0.05n = 1.25
1.7 - 0.05n = 1.25
-0.05n = -0.45
n = 9

9 Nickels, 8 Dimes

Answer Link

Otras preguntas

Identify the type of verb: The tune-up cost only $15.a. linking irregular weak verb.b. linking regular weak verb.c. irregular.d. regular.

How did john dalton explain a chemical reaction using his atomic theory?

what is the most likely reason president ford pardoned nixon?

the length of rectangular garden is 5 feet longer than the width. If the are of the garden is 50 square feet, find the length and the width of the garden

For about how many years of geological time have humans existed on Earth?

A type of employment test that is used to determine if personal and behavior preferences match the position. a. Personality b. Skills c. Technical d. Background

Which mutation does the given change in nucleotide sequence represent? ATTGCATC → ATACGTTC

Find the discriminant of the quadratic $3x^2 - 7x + 6.$

To determine whether the inverse of a function is a function, you can perform the vertical line test. A. True B. False

What happens to a current when it comes in contact with a continent or landmass?