9.Let's make mathematical expressions. Then simplify and solve these problems. a) Sunayana bought 6 pencils at Rs 8 each and she gave a Rs 50 note tonthe shopkeeper for the payment. How much change did the shopkeeper
return her?
b) Anil bought 6 exercise books at Rs 40 each and an eraser for Rs 10, He gave a Rs 500 note to the shopkeeper for the payment. How much
change did the shopkeeper return him?
c) The cost of 1 kg of rice is Rs 90 and 1 kg of sugar is Rs 80. Find the total cost of 5 kg of rice and 2 kg of sugar.
d) On a day, there were 27 students present in class six. 16 of them were girls and the rest were boys. If only 3 boys were absent on that day, find the number of boys in class six.
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the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation:

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4