myatayler12 myatayler12

07-10-2016
Mathematics

contestada

-7x2y=-13
x-2y=11

Slove useing subtract

Respuesta :

apologiabiology apologiabiology

07-10-2016

-7x+2y=-13
x-2y=11
add them euations

-7x+2y=-13
1x-2y=11 +
-6x+0y=-2

-6x=-2
divide both sides by -6
x=1/3

sub back
x-2y=11
1/3-2y=11
minus 1/3 both sides
-2y=10 and 2/3
divide both sides by -2 (or times both sides by -1/2)
y=-5 and 1/3

x=1/3
y=-5 and 1/3
(1/3,-16/3)

Answer Link

Otras preguntas

A deck of cards contains RED cards numbered 1,2,3 and BLUE cards numbered 1,2,3,4,5,6. Let R be the event of drawing a red card, B the event of drawing a blue c

1.72 mol of LiCl in 37.5 L of solution

Use the graph to evaluate the step function at x =3

Of the following two events, which has a greater chance of increasing tuition rates at your university?(i) The President of the university gets a raise of $1,00

What is the net production of ATP, pyruvate, and NADH when one molecule of glucose undergoes glycolysis? a. 2 ATP, 2 NADH, and 2 pyruvate b. 4 ATP, 1 NADH, 2 py

If you are lying down and stand up quickly, you can get dizzy or feel faint. This is because the blood vessels don’t have time to expand to compensate for the b

Who started world war 2

Although the number of their physical stores is limited, L.L.Bean is widely known for offering unique, high-quality merchandise. Adding an Internet channel was

The sales tax on the price of a futon is $37.68. If the tax is 8%, find the purchase price of the futon.

Which equation is graphed here? a. y + 5 = -3/2 (x - 4) b. y + 5 = -2/3 (x + 4) c. y + 5 = -3/2 (x + 4) d. y + 4 = -3/2 (x - 5) Graph Shown Below. Please help!

good job