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SVEN [57.7K]
3 years ago
5

Simplify the expression. 4/5-7/9+1/5

Mathematics
2 answers:
Alexxx [7]3 years ago
8 0
Find the LCD (Least common denominator) from 5, 9, 5 and that would be 45.

make the denominators the same as the LCD

simplify, now the denominators are equal and in harmony

join the denominators together

simplify and you get 10/45

simplify and your answer would be 2/9.
lys-0071 [83]3 years ago
3 0
4/5 - 7/9 + 1/5
(4/5 + 1/5) - 7/9
1 - 7/9
9/9 - 7/9
2/9 <==
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Ruslan reads 1/3 of a book every day. He needs to read 4 books for class. HOw long would it take him to read 4 books?
Korolek [52]

It would take him 12 days.


1/3 x 3 = 3

3x4=12
5 0
3 years ago
8% of what number is 16
aliina [53]
200, because 8% is 8 parts of 100%. Then 1 part of that 100% is 16/8=2. Then 100% is the number i.e; 200
7 0
3 years ago
Read 2 more answers
49 x ? = 220.5 sorry about the last question this is what it was supposed to be
Jobisdone [24]
4.5 is the answer


Divide 49 from both sides

220.5 / 49 = 4.5

8 0
3 years ago
Read 2 more answers
Which of the following are measurements of the sides of a right triangle?
mojhsa [17]

sides of right angle triangle follows Pythagoras theroem

which states

a^2 +b^2 = c^2

where a , b and c are sides of right angle triangle.

here none of options do not follow this.

so answer is option D

4 0
3 years ago
Read 2 more answers
What is the mass of 2.5 moles of carbon dioxide?
GarryVolchara [31]

Answer:

110 grams

Step-by-step explanation:

CO2 molecule is made up of Carbon (atomic mass =12) and oxygen (atomic mass=16).

So first finding the mass of 1 molecule of CO2 which is equals to

= mass of 1 carbon atom + masses of 2 oxygen atom, we get

= 12+(16*2)= 12+32= 44 a.m.u.

Now 1 molecule of CO2 has mass 44 amu so mass of 1 mole CO2 will be 44 grams.( 1 a.m.u.=1.6729*10^-33 grams. 1 mole = 6.022*10^23, so 44 a.m.u.=73.6076*10^-33 grams approx. For one mole CO2, 73.6076*10^-33*6.022*10^23 which is approximately equals to 44 grams. )

1 mole CO2= 44grams, so 2.5 moles = 44*2.5= 110 grams

So our answer is 110 grams.

lowkey hope this helped you, good luck whatever you need it for Imaooo

3 0
3 years ago
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