Factoring with two variables 6w^4-54w^2

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.