Mrs perry shares out 20 biscuits between gemma and zak in the ratio 1:4

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount