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
Answer:
2.5
Step-by-step explanation:
its a decimal
We can solve this problem by using the laws of exponents. The laws of exponents state:

=

We can use this law in our situation. The answer here, using the laws of exponents, is

or
5.
Answer:
$125 in a year ($2,625 total)
Step-by-step explanation:
We know that a percentage is out of 100 so we set up a proportion:
5/100 = x/2500
When we crossmultiply we get 12,500 then we divide by 100, getting us 125.