The demand for coffee is given by the following equation, where QD stands for the quantity demanded and P stands for price. QD= 100− 4P The supply of coffee is given by the following equation, where QS stands for the quantity supplied and P stands for price. QS= 10+ 2P a. What is the slope of demand? Slope = b. At what price is quantity demanded equal to zero (this is, graphically, the vertical intercept of Demand)? P = c. What is the slope of supply? Slope = d. At what price is quantity supplied equal to zero (this is, graphically, the vertical intercept of Supply)? P =

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.

you have to find the same variables -3n - 5n so this would be -3n +(-5n) which equals -9n