08-09-2017
Mathematics

contestada

3x+5y=4, 2x-y=-7 solve using substitution

Respuesta :

ghanami ghanami

08-09-2017

3x+5y=4...(1)
2x-y=-7...(2)
by(2) : y = 2x+7
subsct in (1) :
3x +5(2x+7) = 4
13x = - 31
x = -31/13
y = 2(-31/13)+7 = 29/13

Answer Link

Otras preguntas

the physical process of evaporation involves

A pluralist might agree with all of the following statements except a. political resources are not equally divided. b. mass opinion and the interests of citizen

What multiplies to be 72 and adds to be -17

Select all that apply. According to the text, which of the following were reasons the novel was not initially accepted by literate society? Novels were often fo

Which of the following is a direct cause of surface currents? A. uneven heating B. high salinity C. differences in density D. wind forces

Equivalent fractions to 21/35

Which phrase best describes osmosis? A. the process by which the cytoplasm physically divides B. the process of DNA synthesis C. the process where a selectively

in which quadrant is the graph of (-8, 6) located?

Area= 169(pie)mm(squared) What's the radius and diameter

what category of organisms can mate and produce fertile offspring