Hi there! , me on these problems! and show how to do it, 1) 8(5x-3y)= 2)a-5/6=-3and2/3 3)k+7.2=3.4 be clear with instructions

Aiden buys two bags of chips at $1.09 each and a 20 ounce soda for $1.20 at the gas station. he knows that the state tax is 5.5. how much change will he receive from a $5 bill?

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle