sashaaa06 sashaaa06

23-10-2019
Mathematics

contestada

3. Rob has 40 coins, all dimes and quarters, worth $7.60. How many dimes and how many quarters
does he have?

Respuesta :

HomeworkHelper389 HomeworkHelper389

23-10-2019

x = quarters
y = dimes
x + y = 40
25x + 10y = 760
25x + 10(40 - x) = 760
25x + 400 - 10x = 760
15x + 400 = 760
15x = 360
x = 24
y = 16
Rob has 24 quarters and 16 dimes

Answer Link

Otras preguntas

PLS HELP!! Joshua and Isabella are having a snowball fight. Joshua has a snowball, shaped as a sphere, with a radius of 6 cm. Isabella also has a spherical sno

4,3,9/4,27/16 what is the 10th term of the sequence

Explain why the ability to taste bitter substances is an important trait to have. (2-3 sentences)

For example, U2 front man Bono announced a new street art campaign to help fight serious illnesses around the world. For the campaign, famous street artists are

What is the radius of the circle in the xy-plane that has center (1,5) and contains the point (4,9)?

what is the differences between romeo's reaction to the banishment than juliet

which property decribes a materails abilty to conduct heat ? A . Electrical conductivity B . Boiling point C . Thermal conductivity D . Melting point

What is a titration procedure used for? Question 2 options: Titrations identify how toxic a solution is. Titrations test the pH level of an unknown solution b

A train leaves boston and travels toward its destination

What aspects of Chinese society did Shikoku bring to Japan? I’m marking BRAINLIEST!!