If m<5 is 50 degrees then what is the measure of angle 7?

Which of the following expressions is equal to 2x^2+8

Evaluate cos2θ for cosθ = square root of 3/2

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?