Answer:
first find a LCM or least common multiple
-25/40+(-64/40)=
add the numerators or top number
-88/40
then you simplify it
-2 8/40
-2 1/5
I hope this is good enough:
4(x+7)=8x-20
4x+28=8x-20
28=4x-20
48=4x
x=12
Answer:
<h2>81.28</h2>
Step-by-step explanation:
To solve this kind of problem, we must remember that the word "of" means multiplication in math language, and all percentages numbers can be expressed as a fraction where the denominator is 100. Applying all this, we have

Therefore, all those percentages of 8128 results in 81.28
Answer
The distance from the house to the lake is (2.5 hr)*(48 mi/hr) = 120 miles. The rerurn trip would take (120 mi)/(40 mi/hr) = 3 hours. Distance equals rate times time, so the distance to the lake is 2 1/2 hours times 48 miles per hour.
I hope this helps