If f(x)=2x^2+3 then f(x-1)=2x^2+4x+5 true or false

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?