nour47 nour47
  • 04-09-2019
  • Mathematics
contestada

If y - x = 2 and y + x = -2, then
(x+y)(x - y) =
(A) -4 (B) -2 (C) 0 (D) 2
(E) 4

Respuesta :

tonio98
tonio98 tonio98
  • 04-09-2019
54 dhdndifivdhdjsjsjjdjxjsjsjdj
Answer Link
litaisone
litaisone litaisone
  • 04-09-2019

Answer:

E: 4

Step-by-step explanation:

This is a system of equations so is you line them up and subtract them, you get -2x=4. solve it and you get x=-2. Then plug it into one of the equations to get y. (y=0). since y is equal to 0, we can conclude that  -2x-2=4

Answer Link

Otras preguntas

We would expect warmer Northern Atlantic currents to have all BUT ONE of these consequences on Earth. A) higher sea level B) increased ice melt C) decreased p
Which of the following elements would most likely become a positive ion when forming a chemical bond? A. Sulfur B. Helium C. Carbon D. Calcium
Paul Robeson supported what idea?
Substitution Method. Help please? #5 please!
I need help with number 10!
Which words in the sentence make up the adjective phrase? The Grand Canyon is a steep-sided canyon with a river. A. a river B. Grand Canyon C. with a
Answer for number nine
Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -36 and 2304, respectively.
John Brown was found guilty of treason for his attack on the Harper's Ferry arsenal. True False
Which of these is not associated with a roundworm infection?