Write an equation of the line that passes through (1, 2) and is perpendicular to the line y =1/3x + 4.

y= -3x + 5

Step-by-step explanation:

negative reciprocial of the slope:

m=1/3

m=-3

Subsitube the point (1,2) into y=mx+b with new slope and solve for b:

y=mx+b

2=-3(1)+b

b=5

Equation:

y=-3x+5

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.