Mariana walked 3/10 mile to the park. Later, she walked 1/4 mile to a friend's house. Then she walked 2/5 mile home. How many mi
les did Mariana walk in all?
1 answer:
Answer:
19/20 of a mile.
Step-by-step explanation:

The common denominator is 20 so we times the first one by 2 the second one by 5 and the last one by 4. (Both numerator and denominator.)
You will end up with this 
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THE first option is correct
Answer:
¹9.2
<u> +7.9 </u>
¹ 17.1
<u> +5.0</u>
22.1
21.1 miles
-5, you never want the denominator to equal zero or else it doesnt exist!
x+5=0
x=-5
Answer: $244.55
A = $250 ; r=0.002 t= 11 [From 2007 to 2018 , t=2018-2007]