jenifermolinar1 jenifermolinar1

21-01-2015
Mathematics

contestada

you have a total of 21 coins , all nickels and dimes. the total value is $1.70. how many nickels and how many dimes do you have?

Respuesta :

samrawit samrawit

21-01-2015

Equations:
n + d = 21
5n + 10d = 170 cents
----------------------------
Multiply thru the 1st equation by 5:
5n + 5d = 5*21
5n +10d = 170
--------------

Subtract and solve for "d":
5d = 65
d = 13 (# of dimes)
----
n+d = 21
n + 13 = 21
n = 8 (# of nickels)

Answer Link

Otras preguntas

Major question from my homework I am doing Are technology commercials advertisements aimed at teenagers effective? Are technology advertisements aimed at teenag

Find C. Round to the nearest tenth. с 17 ft 8 ft B А 16 ft C = [ ? ] Law of Cosines : c2 = a2 + b2 - 2ab cos C Enter

For what purpose did the gods create Enkidu?

Anyone knows the answer

According to the Constitution, the right of freedom of religion supports

How is the temperature scale different than a typical thermometer?

What is the meaning of having 150% of a pizza? Draw a diagram to represent this.

Using the graph below, what would the y-value (range) be for an x-value (domain) of -3? -9 0 1 3

12. Which of the relations below is a function? A. {(1, 1,), (2, 1), (3, 1), (4, 1), (5, 1)} B. {(3, 1), (2, 2), (3, 3), (2, 4), (2,5)} C. {(2, 1), (2, 2), (2,

Is the answer correct yes or no .If it correct write it correct if it wrongs write the correct answer.