odelllinkin2002 odelllinkin2002

01-11-2017
Mathematics

contestada

3x+5y=2 and 9x+11y=14 equals

Respuesta :

choixongdong choixongdong

01-11-2017

3x+5y=2 (1)
9x+11y=14 (2)

multiply equation (1) by 3
9x + 15y = 6

so
9x + 15y = 6 (1')
9x + 11y =14 (2)
-------------------------subtract
4y = -8
y = -2

3x+5y =2
3x+5(-2) =2
3x - 10 = 2
3x = 12
x = 4

answer
(4, -2)

Answer Link

Otras preguntas

In a reinforcement type of situation, program plans are initiated to preserve and develop customer or public support.

A 5-year-old boy has fallen and has a severe deformity of the forearm near the wrist. he has possibly sustained a fracture of the ____________ forearm

Describe three economic factors that were involved in the choices made by Brazilians to abandon ethanol powered automobiles. Why have many Brazilians returned t

If the third term in an arithmetic sequence is 7 and the common difference is -5, what is the value of the fourth termA.12B.2C.-35D.35

As the total resistance of a circuit increases, so does current. True False

What is the effect of the author’s word choice in the passage?

Only some of the European colonies in West Africa became independent by 1974. True False

On a graph with y-values ranging from 1,013,020 to 9,618,115, what is a reasonable scale to use on a y-axis with 10 tick marks?

In most instances, the solubility of solids in liquids __________ as temperature increases. decreases stays the same increases solids are insoluble

Darren is finding the equation in the form y=mx+b for a trend line that passes through the points (2, 18) and (–3, 8). Which value should he use as b in his eq