Seudónimo Seudónimo

02-12-2016
Mathematics

contestada

solve system by elimination
9x-3y=3
3x+8y=-17

Respuesta :

apologiabiology apologiabiology

02-12-2016

multiply 2nd equation by -3 and add to first

9x-3y=3
-9x-24y=51+
0x-27y=54

-27y=54
divide both sides by -27
y=-2

sub back
3x+8y=-17
3x+8(-2)=-17
3x-16=-17
add 16 to both sides
3x=-1
divide 3
x=-1/3

(x,y)
(-1/3,-2)

Answer Link

Otras preguntas

What will 4 balloons cost if 10 balloons cost £3.00

What effect does Shakespeare's uneven use of iambic pentameter have on the reader? A. Readers become confused, which leads them to question the language and und

when a sentence begins with two prepositonal phrases joined by word and, where should the writer place a comma?

a source that lists words with similar meanings is called a _____. a. synonym b. persona c. thesaurus d. dictionary

Can I do B.com honours with maths as my additional subject rather than as my main subject

Give me an example of subject-verb agreement

where is the area around 54°40’

5x + 10y = 18 x = y - 6 Which of the following equations is the result of substituting y - 6 in for x in the first equation? 5x + 10y - 6 = 18 5y - 6 + 10y = 18

what are the solution(s) to the quadratic equation 9x2 = 4? x = 4/9 and x = -4/9 x = 4/9 and x = -2/3 x = 3/2 and x = -3/2 no real solution

the yard behind cindy house is rectangular in shape and has a perimeter of 72 feet. if the length of the yard is 18 feet longer than the width of the yard, wha