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

Which one do i pick?

please help me ;-; Evaluate the following exponentials at the given values Given f(x)=5^x-3, find f(5)

Helpppnmejhhhhhhhhhhhg pls

when did world war 2 begin?

Please help!!! I’ll give brainliest if your correct

Write the expression below as a product of two factors. 6 + 8 + 4

When a box is placed on an inclined surface with no friction, it will:

Mr. Duncan earns 75$ a day plus 35$ for each car he sells. if c is his total earnings and x is the number of cars he sold, what is the equation

What geological feature can be created by a divergent boundary? A. Mountain chains B. Volcanoes C. Earthquakes D. Mid-ocean ridge, rift valleys

How did China flourish during the Ming Dynasty? a. Religiously by building temples b. Economically by trading C. Culturally with cultural interactions. d. Both