Can someone please help me and show all the work step by step please

Which formula gives the area of a triangle? a=1/2(b+h)

Timed***how else can the sequence for row 1 be written? notice: square a: 1 penny = 20 square b: 2 pennies = 21 square c: 4 pennies = 22 the sequence formed is geometric, with a1 = , and common ratio r = .

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?