(7x^3-6+5x^2)+(6x^4-2-6x^3)+(4x^2+3 x^4+8x)

7x^3 - 6 + 5x^2 + 6x^4 - 2 - 6x^3 + (4x^2 + 3x^4 + 8x)

7x^3 - 6 + 5x^2 + 6x^4 - 2 - 6x^3 + 4x^2 + 81 +8x

x^3 - 6 + 5x^2 + 6x^4 - 2 - 6x^3 + 4x^2 + 81 +8x

X^3 +73 + 5x^2 + 6x^4 + 4x^2 +8x

X^3 +73 + 9x^2 + 6x^4 +8x

the correct answer is

6x^4 + x^3 + 9x^2 +8x +73

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10