Iwonder who can solve this ? 20×20÷5+100-50

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)

Trapezoid tuvw is shown on the coordinate plane below: trapezoid tuvw on the coordinate plane with ordered pairs at t 4, 6, at u 7, 6, at v 7, 3, at w 2, 3. if trapezoid t'u'v'w' represents trapezoid tuvw reflected over the y-axis, the ordered pair of w' is (note: you must include parentheses, a comma, and a space after the comma when typing the ordered pair.)