For the summer, Tia buys 3 T-shirts and 2 pairs of shorts Her brother buys 4 T-shirts and 1 pair of shorts. Define and use variables to represent the total cost.

820,000 is the answr

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

The final answer is a