aeromonkey69 aeromonkey69
  • 17-09-2014
  • Mathematics
contestada

The average of two numbers is 25 and their difference is 8. What are the numbers?

Respuesta :

Аноним Аноним
  • 17-09-2014
[tex]x;y-the\ numbers\\\\ \left\{\begin{array}{ccc}\frac{x+y}{2}=25&|multiply\ both\ sides\ by\ 2\\x-y=8\end{array}\right\\+\left\{\begin{array}{ccc}x+y=50\\x-y=8\end{array}\right\ \ \ |add\ sides\ of\ the\ equations\\---------\\.\ \ \ \ \ \ \ \ 2x=58\ \ \ \ \ \ \ |divide\ both\ sides\ by\ 2\\.\ \ \ \ \ \ \ \ \ \ x=29\\\\29+y=50\\y=50-29\\y=21\\\\Answer:29\ and\ 21.[/tex]
Answer Link

Otras preguntas

songhai was best known for a
A nurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. If the stock bottle is labeled 30.mg/mL and the or
A substance that yields a cation plus the hydroxyl ion in water is a(n)_____.
( 4 ten thousands 8 hundreds) ÷ 10 in unit form and standard form
Name three different complex fractions that simplify to 1/4
What element produces violet light of approximately 412 nm? a. hydrogen b. mercury c. sodium d. neon
which of the following was the primary reason France sought to colonize North america? To reduce overpopulation in Europe To create communities founded on relig
What is the symbol of a sodium ion, Na , followed by the formula of a sulfate ion, SO42−
train travels 2144 miles in 8 hours. how many miles did it travel in 1 hour
When would it be more useful to represent a proportional relationship with a graph rather than an equation