Answer:
x=-3
Step-by-step explanation:

x+3=0
-3 -3
x= -3
opposite of addition would be subtraction. since your trying to solve for x You want to get x alone and you subtract by 3 on both sides which would cancel the 3 on the left, leaving:

if you follow the same process on all of them you come to the conclusion that only -3 is a zero in the options listed.
NOTE: When you become more experienced whenever you see expressions like that you'll come to realize that the zero is the opposite sign of the number if it's just x- or x+ a number.
example:

it'll be the opposite sign so since it's a negative the zero of that would be positive 40.
hope this helps!
Answer:
5 hours
Explanation:
75 + 25h = 40h
75 = 15h
h = 5
B i think hope this helps
Answer:
it would range between 11.28379... to 13.819765...
Step-by-step explanation:
the circle's area formula is pi * radius^2
so you make to equation, plugging the 100 and 150 into the circle's area
you get square root of (100/pi) which gets 11.28379... for the area of 100
you do the same with 150 to get square root of (150/pi) which gets 13.819765...
those are the diameter of the circle since the diameter is double the radius which i already multiplied afterwards. so if you need the radius divide the number ive given you
Answer:
Step-by-step explanation:
I believe it is 26?