Solve the following pairs of simultaneous equations.
a) 2x - 2y = -4
5x + 4y = 17
b) 2x - 3y = 6
4x - 5y = 9
c) x / 3 + y / 2 = 3 / 2
x / 2 + y / 5 = -1 / 2

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

answer: 819.89 miles across america

step-by-step explanation:

what is the model?

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.