Starfish23 Starfish23

17-01-2017
Mathematics

contestada

Solve using linear combination

x-y=-7
x+y=7

A. (-7,0)
B. (7,0)
C. (0,7)
D. (0,-7)

Respuesta :

apologiabiology apologiabiology

17-01-2017

add them equationas and y's cancel

x-y=-7
x+y=7 +
2x+0y=0

2x=0
x=0

so

0+y=7
y=7

(x,y)
x=0, y=7
(0,7)

C

Answer Link

Otras preguntas

Jimmy is interested in purchasing some yellow and red flowers for his mother's birthday. He visits a local floral shop and gift shop. Both businesses have a var

Please help giving 20 points An earth-like planet is 500 light years away why is this an obstacle for a manned space mission A. There are no plans to send a hum

Which of the following statements about transferable skills is true? A. Employers discourage workers from gaining transferable skills because they might leave.

Please help with number one and 2 please

how is a universal genetic code similar to the hypothesis about the origin of life on Earth?

A thin film of acetone (n = 1.25) coats a thick glass plate (n = 1.50). White light is incident normal to the film. In the reflections, fully destructive interf

Pencils sell for 18 cents each, and pens sell for 69 cents each. How much would 14 pencils and 11 pens cost?

Difference between duracell and interstate golf cart batteries

HEEEEEEEEELPPPPPPPPPPPM AAAAAAAAAAASSSSSSSSSAAAAAAAAAPPPPPPPPPP

How many atoms of Fluorine are in 595.85g of SeO2F2? A: 6.02 x 10^23 B: 1.204 x 10^24 C: 2.408 x 10^24 D: 4.816 x 10^24