loganplaysroblox9210 loganplaysroblox9210

16-11-2020
Mathematics

contestada

Rob has 40 coins, all dimes and quarters, worth $7.60. Write the system needed to determine the
number of dimes and quarters.

WILL GIVE BRAINLIEST

Respuesta :

monaply monaply

16-11-2020

Answer:d + q = 40 -----> d = 40 - q

10d + 25q = 760

Substitute!

10(40 - q) + 25q = 760

400 - 10q + 25q = 760

15q = 360

q = 24

d = 40 - 24

d = 16

Step-by-step explanation:

Answer Link

Otras preguntas

How many feet are there in 3 miles

Who was elected the first President of the United States? John Adams James Madison Patrick Henry George Washington

What is the answer to this equation 1/2 ()4+8 ()=-40

What is the biggest sigle factor in environmental science today A POLLUTION BRAPID HUMAN POPULATION GROWTH C URBANIZATION D GLOBAL WARMING

A rolling ball will eventually come to a stop why?

steve gets $100 a week plus 15 of sales. which equation best represents his salary

Oman said that it is impossible to raise a number to the power of 2 and get a value less than the original number.Do you agree with oman? Justify your reasoning

find the value of 4a-3 when a=6

Anybody can help me on this one?

A student earns $11.75 per hour for gardening if she Worked 21 hours this moth then how much did she earn. Explain