kellyyk kellyyk
  • 19-06-2017
  • Mathematics
contestada

x + y = 4 x - 2y = -5 If the first equation is multiplied by 2 and then the equations are added, the result is _____.

Respuesta :

mergl
mergl mergl
  • 19-06-2017
x+y=4
x-2y=-5

2(x+y=4)
2x+2y=8
+(x-2y=-5)
3x+0=3
3x=3
x=1
Answer Link

Otras preguntas

Kobe is testing whether 100g of substance a, 100g of substance b, or 100g of substance c produces more oxygen in a chemical reaction at 25° c. what is the indep
The colonist Protested the stamp act by
i need to evaluate log base 3 (1/162)
At 7 pm last night the temperature was 10° at 7 am the next morning the temperature was -2° by how much did the temperature change from 7 pm to 7 am
find the nth term o this sequence 5 7 9 11 13 ...
A veterinarian is changing the diets of two animals simba and cuddles.simba currently consumes 1200 calories per day. that number will increase 100 calories eac
How do you find the power of a product?
What is perseverance?
A line passes through the point (-8, 7) and has a slope of negative 3/4 Write an equation in slope-intercept form for this line.
This is the wants, needs, or beliefs that cause a character to act or react in a particular way?