The marked price of a car is $49500. A person can pay a deposit of 30% and simple interest at 12% annum is charged on the outstanding balance. The total amount payable is to be paid in 2.5 years. calculate: a). The amount of each instalment.
b). The hire purchase of the car.​

Answer is in the file below

https://cutt.ly/wzdvC7R

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.