\dfrac{1}{5}(6+3+1)^2 = 5 1 ​ (6+3+1) 2 =start fraction, 1, divided by, 5, end fraction, left parenthesis, 6, plus, 3, plus, 1, right parenthesis, squared, equals (any help!?!?!?!?

Prove that quadrilateral is a rhombus.

The function models the number of accidents

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.