What is the y-coordinate of the solution for the system of equations? x−y=−11 y+7=−2x enter your answer in the box.

The given system of equations is :

x−y=−11 ...(1)

y+7=−2x ...(2)

First step is to solve equation (1) for x so that we can substitute that x in equation (2) to get the value of y. So, add y to each sides of equation (1). Hence,

x = y - 11.

Next step is to plug in y - 11 for x in equation (2). So,

y + 7 = -2(y - 11)

y + 7 = -2y + 22 By distribution property.

y + 7 - 7 = -2y + 22 - 7 Subtract 22 from each sides.

y = -2y + 15

y + 2y = -2y + 15 + 2y Add 2y to each sides of the equation.

3y = 15

Divide each sides by 3.

So, y = 5.

20%

step-by-step explanation:

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.