boybaby boybaby

03-01-2020
Mathematics

contestada

what is the solution of the systrem 2x - y = -7 4x - y = -4

Respuesta :

Yang100 Yang100

03-01-2020

Answer:

x=3/2, y=10. (3/2, 10).

Step-by-step explanation:

2x-y=-7

4x-y=-4

--------------

-2(2x-y)=-2(-7)

4x-y=-4

---------------------

-4x+2y=14

4x-y=-4

-----------------

y=10

2x-10=-7

2x=-7+10

2x=3

x=3/2

Answer Link

Otras preguntas

a) which line, a or b, is parallel to the x-axis? b) work out the equation of this line

Lucy is pulling weeds out of her garden. The garden starts with 3 weeds, but each time Lucy pulls 1 weed, 3 more weeds grow in its place! How many weeds will be

Find the closed formula

Find the value of x. Round your answer to the nearest tenth: 37 6 x

2x/3 - 3x/8 = 7/12 Please explain. I need help.

Old MacDonald has 100 chickens and goats in the barnyard. Altogether, there are 298 feet. How many chickens and how many goats are in the barnyard?

Assuming air to be mixture of gases by volume 20% oxygen and 80% nitrogen (both diatomic gases). Calculate the mass of 1dm ³ of air at STP?

You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population

Evaluate the following | -8 | = |15| =

Expository essay introduction for quincenera