Answer:
So you want to multiply each of the sides like you would with a rectangle.
Step-by-step explanation:
1125
u take 1800 and times it by 5 and divide it by the total of 3+5 so u divide it by 8
1800 x 5 divided by 8 + 1125
The first step would be to add 40 to both sides of the equation, you can use multiple methods to solve from there, but I recommend 'completing the square' since your b value is equal to zero :)
A) the 9 is in the thousands
b) the 2 is in the ones
c) the 5 is in the hundreds