Idon’t know how to math. plz . just the answer

We have that
x--------------> jawbreaker--------------> 0.25 lb each
y------------- > gumball--------------> 0.10 lb

we know that

0.25x+0.10 y<=1----------> remember that 0.25=1/4  and 0.10=1/10
therefore
(1/4)x+(1/10)y<=1
the answer is the option A

using a graph tool
see the solution in the attached figure

the solution is the triangular figure

The value of an expression, is a variable or a constant of any number or other mathematical object assigned to it. the value of a mathematical expression is the result of the computation described by this expression when the variables & constants in it are assigned values .

ur welcome!