First person to asnwer gets brainliest I need help what is the periodicity of a swaying tree if it takes the tree 1.75 Hz to sway back & forth Formula : T=l/f

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Will give brainliest what is the value of x? enter your answer in the box.

Which expression shows the sum of the polynomials with like terms grouped together