Answer:

Step-by-step explanation:
<em>Set the problem up as a proportion</em>
<em />
<em />
<em>cross multiply</em>
<em />
<em />
<em>divide both sides by 30</em>
<em />
<em />
<em />
<em>plz mark me brainliest. :)</em>
The two at the top technically means how many times the number in the bracket times ITSELF by, so its technically -3 x -3 which is +9 , cause a negative x negative = positive
Answer:
Step-by-step explanation:
x° + y° = 180°
2y° - 0.5x° = 180°
y° = 108°
x° = 72°
Answer:
816 square feet
Step-by-step explanation:
13(16+20+12) + 16(12) = 816