There are 10 boys and 20 girls in a class.
The class has a test.
The mean mark for all the class is 60.
The mean mark for the girls is 54.
Work out the mean mark for the boys.

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.