Answer:
31.25×
Step-by-step explanation:
suppose that the value of x was 3 . that would mean that they bought 3 calculators .
if one calculator is $31.25 then 3 would be $31.25× 3
the same rule would apply for x
First, you would need to determine how many questions he got correct.
30 - 12 = 18
Next, you would need to create an equation for this problem. Let x represent the unknown percentage.

=

Now, you would cross multiply.
30x = 1,800
The last step would be to isolate the x. To do this, you would divide both sides of the equal sign by 30.
x =
60Ahmad got 60% of the questions correct. I hope this helps!
B. 5x - 8 = 40x - 8 has no solution because on the right side we will get 0
Answer:
5
Step-by-step explanation:
Hello!
We put in 2 for x and 6 for y

Now we can solve this


The answer is 5
Hope this helps!
The mean is 2.5. also there is mean, median, mode calculators online to help you with these in the future