document.write( "Question 69182: suppose you just have enough dimes and quarters to pay for a loaf of bread and a quart of milk, which cost $3.45. you have a total of 15 dimes and quarters.\r
\n" ); document.write( "\n" ); document.write( "let d = the number of dimes you have
\n" ); document.write( "let q = the number of quarters you have\r
\n" ); document.write( "\n" ); document.write( "a. write a system of equations that models the information given above.
\n" ); document.write( "b. solve the system for the number of dimes and quarters you have.
\n" ); document.write( "

Algebra.Com's Answer #49269 by checkley75(3666)\"\" \"About 
You can put this solution on YOUR website!
D+Q=15 D=15-Q NOW SUBSTITUTE (15-Q) FOR D IN THE SECOND EQUATION
\n" ); document.write( "10D+25Q=345
\n" ); document.write( "10(15-Q)+25Q=345
\n" ); document.write( "150-10Q+25Q=345
\n" ); document.write( "15Q=345-150
\n" ); document.write( "15Q=195
\n" ); document.write( "Q=195/15
\n" ); document.write( "Q=13 NUMBER OF QUARTERS.
\n" ); document.write( "D+13=15
\n" ); document.write( "D=15-13
\n" ); document.write( "D=2 NUMBER OF DIMES
\n" ); document.write( "PROOF
\n" ); document.write( "10*2+25*13=345
\n" ); document.write( "20+325=345
\n" ); document.write( "345=345
\n" ); document.write( "
\n" );