A/4=8/16 what is the missing number

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Ac contractor is building a new subdivision outside of the city. he has started work on the first street and is planning on the other streets to run in a direction parallel to the first. the second street will pass through (-2,4) find the equation of the location of the second street in standard form. a.2x+y=2 b. x-y=2 c.2x+y=2 d. x+y=2

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?