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

in addition to weaponry, communication, and medicine, which war time industries had significant technological breakthroughs?
why is it harmful to feel hostile often?
Which kind of clause modifies adjectives, verbs, or adverbs?
The underline word is worst. What is the degree of comparison of the underlined modifier? That was the worst movie I have ever seen. A. superlative B. c
How did Roosevelt change the role of the U.S. president during the New Deal? (4 points) He damaged long-term relations between the president and Congress. He a
what is 1/2 of 25 explain
What are the layers of the Earth's atmosphere?
What is the value of x? 3 • (–4) • x = 0 x =
Solve using substitution. 4a=3b+3 a=b-1
Can someone explain how to do this Geometry problem? Eliot is playing football. He is 6 feet tall. He stands exactly half way between two floodlights. The flood