Beniah sells hats and umbrellas. He charges $7.75 per hat and $9.50 per umbrella. Last week he sold 90 items for a total of$757. Let x represent the number of hats that Beniah sold and y represent the number of umbrellas that he sold. Which system of equations could be used to model this situation?

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.

What is the perimeter of an equilateral triangle if each side is (x+3)?

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.