If you write a number over another number, it's called a FRACTION
Keywords
linear equation, variables
Step 1
Define the variables
Let
x-----> number of erasers
y-----> total cost
we know that
------> this is the linear equation that represent the situation
therefore
the answer is y = 0.84 + (0.38)x
we are given

we can use factoring formula

we can compare
and we get


now, we can solve for m and n
and we get

now, we can use formula
and we get

now, we can set it equal to 0





so, we will get
.............Answer
-4b-8 + -1b^2 +2b^3
-4(-2)-8+-1(-2)^2+2(-2)^3
8-8+2^2-4^3
4-64
60