9 Tom puts § of his salary into savings every month. The table shows the
amount of savings, a, after each
month.
Number of Amount of
months, m savings, a
1
460
2
690
3
920
4
1,150
2
231
U AWN
1,380
Which function can be used to describe
this relationship?
A a = 460 + 230m
Ba = 230m
Ca = 460 - 230m
Da = 230 + 230m

Apolynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, and a root of 4 with multiplicity 3. if the function has a positive leading coefficient and is of odd degree, which statement about the graph is true?

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4