03-06-2015
Mathematics

contestada

−4x + y = 6
−5x − y = 21

Respuesta :

apologiabiology apologiabiology

03-06-2015

assuming x=x and y=y in both equations
add them together

-4x+y=6
-5x-y=21 +
-9x+0y=27
-9x=27
divide by 9
-x=3
multiply -1
x=-3

subsiutte
-4x+y=6
-4(-3)+y=6
12+y=6
subtract 12
y=-6

x=-3
y=-6
the soultion set is in (x,y) form
(-3,-6)

Answer Link

Otras preguntas

Consider the pedigree that follows for cutis laxa, a connective tissue disorder in which the skin hangs in loose folds. assuming that the trait is rare, what is

What two processes cause locations at high latitudes to receive less intense solar radiation compared to locations at lower latitudes?

When supply increases, the supply curve a. shifts upward. b. shifts to the right. c. shifts to the left. d. becomes steeper.

Salma has a toy car collection of 400 toy cars. She keeps 216 of the toy cars on her wall. What percentage of Salma's toy car collection does she keep on her wa

We find the "steepness," or slope, of a line passing through two points by dividing the difference in the ---Select--- -coordinates of these points by the diffe

According to the marketing mix, if shampoo is sold through grocery stores or a drugstore, and the type of customer is a discount customer, then the shampoo comp

find angle 3,6,and 5 thankssss …………

What categories would you assign to each of the identified categories? (use unaware, resistant, neutral, supportive, and leading as your categories.

A colorless liquid is located in a graduated cylinder that measures 35 mL. If the graduated cylinder has a mass of 137 g AND the cylinder and the

4. Calculate the density of a liquid in a beaker. The beaker has a mass of 15 grams when empty. The beaker plus an unknown liquid has a mass of 53 grams. What i