What is the egyptian system of writing known as?

I believe you're talking about Egyptian Hieroglyphs.

he sent troops to protect the students as they entered the school.

the amount of the purse is, $120.

tax rate =9%

first find the the total tax she paid on the amount is equal to the 9% of $120 i.e,

now,

total amount paid by shalika = $120 +$10.8 = $130.8