we are given

Firstly , we can distribute

now, we can combine like terms


now, we can solve for x
and we get
...........Answer
-1/3
Use the formula m = y2-y1/ x2 - x1.
Substitute the x and y values and you'll get -1/3
So to solve you need to set up equations, Using h as the height. So the base is 9 inches more (+9) than 3 times the height (3h) so 3h+9 equals the base. You have the area so you need to plug in the equation for the base and h for height and divide it all by 2. h(3h+9)/2=105. after you solve that and get h by itself you should get h= 7 and the b= 30
I think the answer is like 0.15¢ assuming the way to solve it is to divide the cost by the Oz per pkg which is 48 so 6.99/48 is 0.15¢ rounded