The value of 110 coins, consisting of dimes and quarters, is $20.30. how many of each kind of coin are there?

Question

01-10-2017
Mathematics

contestada

The value of 110 coins, consisting of dimes and quarters, is $20.30. how many of each kind of coin are there?

Respuesta :

Otras preguntas

William and Stephanie are playing a rather dangerous game of catch on the rooftops of skyscrapers in downtown Chicago. William is preparing to throw a tennis ba

Why was the south so upset by lincoln's election in 1860?

What is the name for the rocky upper layer of the solid earth?

Which Greek scholar is known as “the father of history”? A. Sophocles B. Herodotus C. Thucydides D. Euripides

bags of 10 sold 2430 apples one day

Natalie saved $20 when she purchased a new phone.The phone originally cost $125.What percent savings did Natalie receive on the purchase of the new phone

Is the difference between two negative numbers numbers is always negative.

Georgia. 0.029 can be written as 29 / 100 is he correct

What is the value of the variable that makes the statement true? c + (–8) + (–5) = 0 a. –13 b. –3 c. 3 d. 13

texaschic101 texaschic101 · Answer 1 · 2017-10-01T07:34:47+02:00

texaschic101 texaschic101

01-10-2017

d + q = 110......d = 110 - q
0.10d + 0.25q = 20.30

0.10(110 - q) + 0.25q = 20.30
11 - 0.10q + 0.25q = 20.30
-0.10q + 0.25q = 20.30 - 11
0.15q = 9.30
q = 9.30/0.15
q = 62 <==== there are 62 quarters

d = 110 - q
d = 110 - 62
d = 48 <==== there are 48 dimes

Answer Link