Which of the following is the reciprocal of 7?

Asap will give brainliest and a lot of points

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2