Answer:
Call the number of pizzas x;They buy pizzas from the supplier at:4x+100They sell at:7xWhen these two expressions match they will start to make a profit; so:4x+100=7xRearranging:3x=100x=1003=33.3So after the 33rd pizza they will start to make a profit.For example at the 34th they have payed:34%C3%974+100=236$ to the supplier;Selling they will get: 7%C3%9734=238$. sorry if this is complex
The product of the expressions is -1.5xy⁻¹ or -3x/2y after simplification and y ≠ 0.
<h3>What is an expression?</h3>
It is defined as the combination of constants and variables with mathematical operators.
We have an expression:

Here y ≠ 0 if y = 0 then the expression will be not defined.
After multiplication with a negative quantity.
= -3x/2y or
= -1.5xy⁻¹
Thus, the product of the expressions is -1.5xy⁻¹ or -3x/2y after simplification and y ≠ 0.
Learn more about the expression here:
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Answer:
39 degrees
Step-by-step explanation:
Right triangle
40 ft tree = opposite side
50 feet = adjacent side
tan (angle) = opp / adj = 40 /50
arctan (40/50) = 38.66 degrees ~ 39 degrees