Express cos 7pi/3 as a trigonometric function of an angle in Quadrant I.

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap