mya0206
mya0206
22-01-2019
Mathematics
contestada
What is 2x+y=8 and x-2y=-1
Respuesta :
kayeecheng2102p3s8sa
kayeecheng2102p3s8sa
22-01-2019
the solutions of x and y?
2x+y=8...(1)
x-2y=-1...(2)
for (2), x=-1+2y...(3)
sub(3) into(1),
2(-1+2y) +y=8
-2+4y+y=8
5y=10
y=2
sub y=2 into(3)
x=-1+2(2) =3
therefore, x=3,y=2
Answer Link
VER TODAS LAS RESPUESTAS ( 36+ )
Otras preguntas
Types of amino acids
what are some maze runner quotes that talk about the maze changing?
The shed in Adam’s backyard is shown below. Which correctly describes the dimensions of the figures that make up the shed? a rectangular prism measuring 5 fe
133% of what # is 22.7
Select the correct answer. Which aspect of the excerpt from The Way to Rainy Mountain best exemplifies how American Indian culture and themes can be passed down
What is the value of u, v, w, x, and y?
A sphere has a volume of 500/3 π cubic centimeters. What is the total surface area , in square centimeters, of the sphere
Jim’s work evaluating 2(3/5)^3 is shown below. 2(3/5)^3 = 2(3^3/5) =2(3*3*3/5) =2(27/5) = 54/5 Which statement best describe Jim’s first error? a: He did not m
write a paragraph on a topic of your choice. Use at least fifteen different pronouns
Which best explains the importance of nitrogen in the cycling of energy and matter? A Nitrogen increases protein production in plants. B Nitrogen decreases pr
