What is (b + 3)(-7) simplified

-7b + -21

Multiply within the parenthesis. -7 times B is -7b in its simplest form. -7 times 3 is -21. You cannot add on to a unknown variable so -7b + -21 is your final answer.  

b.-4 units

all you   do is count how many times you move

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.