An after-school costs 2460 kroner a month. The state pays 20% of the amount
a) How much is it?
b) How much does the student have to pay for a stay of 9 months?

a) If the state covers 20% of the cost per month, that means the student has to pay 80%. So the cost per month for the student is:

2460 * 80/100 = 246 * 8 = 1968 kroner

b) The cost for 9 months would be:

1968 * 9 = 17712 kroner

this is answer of 144 cubic meters

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is