What is the sum?

3y 2
+
y^2 + 7y + 10 y + 2

a. 5

y-5

b. 5(y+2)

(y-2)(y+5)

c. 5

y+5

d. 5(y-2)

(y-5)(y+2)

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Asporting good store is offering 30 percent off of the original price(x) of football cleats. the discount will be reduced by an another $7 before sales tax.