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

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

I need to know how many possiable ways are there to make a spare?

determine 6th term in the geometric sequence who first term is 3 and whose common ratio is -4

50 POINTS HELP ASAP ASAP ASAP FAAAAAAST Write a word problem that can be described by the division expression 9 1/3 divided by 2 3/4 . Use complete sentences i

after her death, Miss Haversham honors Pip by

A guitar shop has 19 acoustic guitars on display this is 76% of the total number of guitars what is the total number of guitars the shop is selling

Which of these is the algebraic expression for "some number to the power of six?" A.6x B.X+6 C.X^6 D.6^X

What is the suffix or ending in argument

Bertha's friends recently started drinking. She goes to a lot of parties with them where she is always pressured by the others to have a drink. Which is the bes

What cell types would have the most meiotic activity? Why?

according to the Declaration of Independence what is the purpose of government