44. EARTH DAY You and a group of friends take turns planting 2 trees each at a campsite. After the first person plants 2 trees, there are 12 trees at the campsite. a. Write an equation for the \( n \)th term of the sequence. b. What do you notice about the slope given by the equation and the common difference of the sequence? c. After 8 more people plant trees, how many trees are at the campsite?

A stack of 50 cards is 1.9 cm thick. All cards in the stack have the same thickness. How thick is one card? Show your work.

Square each factor within parentheses. \( (5 w)^{2}=5 \)

Determine the number and type of solutions of the quadratic equation. \( -4 x^{2}-4 x-1=0 \) two imaginary solutions two real solutions one real solution one imaginary solution

For the function below, (a) find the vertex; (b) find the axis of symmetry, (c) determine whether there is a maximum or a minimum value and find that value; and (d) graph the function. \( f(x)=2 x^{2}+10 x+15 \) (a) The vertex is \( \left(-\frac{5}{2}, \frac{5}{2}\right) \). (Type an ordered pair, using integers or fractions.)

a) \( (+72)+(-31)= \)