The three sides make a right triangle and you know the base (90) and the height (70)
A = 1/2 bh or 1/2 x (70)x (90)= 3150 ft²
Answer:
look at the picture i have sent
So to set up the equation we have:
<span><span><span>4M</span><span>4+M</span></span>=<span>127</span></span>
<span>28M=12(4+M)</span>
<span>28M=48+12M</span>
<span>28K−12M=48</span>
<span>(28−12)M=48</span>
<span>16K=48</span>
<span>M=<span>4816</span></span>
<span>M=3</span>
So Marna can clean the chimney alone in 3 hours
The best and most correct answer among the choices provided by the question is the third choice.
The notation "<span>AB (with line over) =4" is the equation that has the most correct notation.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
