thy2002nguyen thy2002nguyen

01-12-2014
Mathematics

contestada

Phil has 50 nickels and dimes worth $4.15. How many of each coin does he have?

Respuesta :

01-12-2014

[tex]x-number\ of\ nickels\\50-x-number\ of\ dimes\\\\0.05x+0.1(50-x)=4.15\\0.05x+5-0.1x=4.15\\0.05x-0.1x=4.15-5\\-0.05x=-0.85\ \ \ \ |:-0.05\\x=17\\\\50-17=33\\\\He\ have\ 17\ nickels\ and\ 33\ dimes.[/tex]

Answer Link

Otras preguntas

What is the rate at which electrical energy is converted into another form

Find the slope of the line that passes through the points (-10,-9)and (-10,8).

Abbie HoffmanJerry RubinTom Hayden once led a group of protesters who tried to levitate the Pentagon in protest of the Vietnam War.

Two males of equal size and leanness but different ages will burn the same amount of calories at rest. true or false?

Photosynthesis is crucial to life on earth in another way besides as the main food supply. What else does photosynthesis continually supply?

What is the vertex of the parabola whose equation is y = (x + 1)2 + 3? (-1, -3) (-1, 3) (1, 3)

Ventifacts are created by a process of erosion called

__________ is the process of making inferences about behavior. Proxemics Attribution Cohesiveness Statusing

Whose roots grow in salt water?

The process of bringing a complaint and filing an answer is known as the _____. a. Trials b. Coercions c. Pleadings d. Counterclaim