fvyu23 fvyu23
  • 09-02-2018
  • Mathematics
contestada

the sum of two numbers is 40 and their difference is 6.5 what is their product

Respuesta :

nickliu02 nickliu02
  • 11-02-2018
Let x = first number, and y = second number. 
x + y = 40 (1)
x - y = 6.5 (2)

Rearrange (2) 
y = x - 6.5 (3)

Sub (3) in (1)
x + (x - 6.5) = 40 
2x - 6.5 = 40
2x = 33.5 
x = 16.75 (4)

Sub (4) in (1) 
16.75 + y =40
y = 23.25 

x * y = 16.75 * 13.25 = 221.9375

The product is 221.9375







Answer Link

Otras preguntas

Ram is 3 times old as his son and the sum of their age is 48.how old is each? (98 points!)
One important thing in finding employment is to get your resume noticed and read.true or false
Solve each proportion 2/8=x/24
Greg has been given a small sample of metal. His teacher has assigned him to identify what type of metal he was given. Which of the following is a physical pro
its timed please help​
In what ways did the events of world war 2 and the holocaust shape the institutions, laws, and attitudes of today? What challenges remain today
How do I solve this equation (7/25)-(9/54)=​
Help my small brain understand.
What three issues did Congress have to resolve while creating a national government?
Santiago recreates this story as she looks back as an adult. Why do you think she includes this story?