mayaduke8372 mayaduke8372

16-11-2017
Mathematics

contestada

If you were solving by substitution, for which variable in the first equation would it be easiest to solve? 3x + y = 7 x – y = 1

Respuesta :

dannielle dannielle

21-11-2017

3x+y=1
7x-y=1⇒ y=7x-1

3x+(7x-1)=1
10x-1=1
10x=1+1
10x=2
x=2/10
x=0,2

3x+y=1
3*0,2+y=1
0,6+y=1
y=1-0,6
y=0,4

Answer Link

Otras preguntas

Me llamo Paula y (1) ____estudiante en la UNAM. Yo (2) ____ en mi tercer año. Mi amiga Marina y yo (3)_____ jóvenes atractivas y simpáticas. Mi familia piensa q

the charge for office visit or procedure usually includes

The social contact theory states that

y 7 • y 9 Multiply or divide as indicated.

Which causes a sea breeze

What is the value of x in the equation 3x -1/9 y = 18, when y = 27? 5 7 45 63

The equation cos(35°) =can be used to find the lengthWhat is the length of PC? Round to the nearest tenthof BC49.6= 20.5 in350B25 in.

what is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

Fill the blank with a la, a las, a los, or al. La profesora va ____ escuela.

cut a rope into 8 equal pieces. each piece was 3/4 long. how long was the original rope