The sum of the roots of x2 + 6x - 55 = 0 is:
0.6
-55

Answer

Step-by-step explanation:

x² + 6x - 55 = 0

x² + 11x - 5x - 55 = 0

x(x + 11) - 5x - 55 = 0

x(x + 11) -5 (x + 11) = 0

(x - 5)(x + 11) = 0

Then solve the value of x

x - 5 = 0

x = 5

or

x + 11 = 0

x = -11

The roots are -11 and 5

Sum of the roots

sum = -11 + 5

sum = -6

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.

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3