tif6f4angilion tif6f4angilion
  • 21-11-2016
  • Mathematics
contestada

If x+y=15 and x-y=25, then what is the value of 2x^2 - y^2?
A) 425
B) 775
C) 825
D) 1,575
E) 1,625 ...?

Respuesta :

antonsandiego
antonsandiego antonsandiego
  • 21-11-2016
I suggest you to use this fromula to solve it: (x−y)(x+y)=x^2−y^2. I'll help you by telling what the values of x and y. y= -5, x = 20. Just put it there and you'll get the answer.
Answer Link

Otras preguntas

A store manager ordered 402 baseball caps and 1 to 2 ski caps estimate the total number of caps the manager watered
What defines the active site?
how many kilometers is 14 centimeters
in 25 minutes li can run 10 laps around the track write an equation to represent the relationship
write the expression in 8^-2/3 in radical notation b evaluate the expression
Choose the correct answers for amount financed and the finance charge in dollars for the following problem. Curtis Hindle purchased a mountain bike for $650.00
To set a variable in ruby?
Suppose Ruth Ann has 3 routes she can choose from to get from school to the library, and 5 routes from the library to her home. How many routes are there from R
what is the square root of 1/25
Which area is studied by biologists