babebeba babebeba

04-03-2022
Mathematics

contestada

5. I have 25 coins consisting of 5-cent and 50-cent pieces. If the total value is $7.10, how many 5-cent coins do I
have?

Respuesta :

Zookanda Zookanda

04-03-2022

Answer:

x = # of 5 cent coins

y = # of 50 cent coins

x+y=25

.05x+.5y=7.1

y=25-x

(.05x+.5(25-x)=7.1)100

5x+50(25-x)=710

5x+1250-50x=710

-45x=-540

x=12

You have 12, 5 cent coins and 13, 50 cent coins.

Answer Link

Otras preguntas

Another name for a period is a family?

Which constitutional principle prohibits an individual state from declaring war? limited government federalism balances popular sovereignty

Nationalism is to pride in one's national identity as a _______ is to a group of people who share a common identity, a sense of unity, and a desire for self-gov

Where and when did the French language start and end?

how does the nucleus of a copper atom compare to the nucleus of a nickel atom

Which of the following are the jovian planets? Jupiter, Saturn, Uranus, and Neptune only only Jupiter and Saturn everything past Mars and the asteroid bel

how can a decimal be converted to percentage?

3 times the sum of 1/3 of a number and 8 is 11

What is 6,000, 234 divided by 3

A person who holds duties, rights, and responsibilities within a state is called