The diagram shows a lawn with a fence along one edge 12m 17m 20m one can of weedkiller can cover 100 square metre each can cost £19.75
work out the total cost of cans of weedkiller needed to cober the lawn you must show some working

59.25 euros

Step-by-step explanation:

The figure that is formed is the following with the respective measurements, now to calculate the area we need the height, for Pythagoras we have:

17 ^ 2 = h ^ 2 + 8 ^ 2

h ^ 2 = 289 - 64

h ^ 2 = 225

h = 15

now the figure area is as follows:

A = h * (b + a) / 2

b long side 20 m and short side 12 cm, replacing:

A = 15 * (12 + 20) / 2

A = 240 m ^ 2

We are told that each can of weedkiller can cover up to 100m ^ 2

Thus:

240/100 = 2.4, so you would need 3 cans of weedkiller

each can costs 19.75, which means that the total cost is:

19.75 * 3 = 59.25 euros

the quotient is 4x^2 - 27x + 167 with a remainder of -996

step-by-step explanation:

in synthetic division, use -6 as the divisor and use the coefficients {4, -3, 5, 6}:

-6     )   4     -3     5     6

                -24   162 -1002

          4   -27   167   -996

thus, the quotient is 4x^2 - 27x + 167 with a remainder of -996.

note:   your "4x°-3x+5x+6" is ambiguous / incomplete.   i had to assume that you meant '4x^3 - 3x^2 + 5x + 6."

£56

step-by-step explanation: