Pls answer this question you will get 50 points who answers it correctly I will mark them branliest
Answers
Answer:
Step-by-step explanation:
i) solving bracket 1 we get 12/72
solving bracket 2 we get 5/125
now add these nos
ii) LCM is 56 now multiply the numerators by 8, 7, 7, 7 respectively and keep denominator as 56
Q 9
1344.42142397
-15000
Step-by-step explanation:
Solutions :-
Q-8:-
I) Given that
[(3/8)×(4/9)] + [ (5/12)×(1/25)]
=> [(3×4)/(8×9)] + [ (5×1)/(12×25)]
=> (12/72)+(5/300)
=> (1/6) + (1/60)
LCM of 6 and 60 = 60
=> [(1×10)+(1×1)]/60
=> (10+1)/60
=> 11/60
II) Given that
(4/7)+(3/8)-(1/7)+(1/8)
On using commutative property then
=> [(4/7)-(1/7)]+[(3/8)+(1/8)]
=> [(4-1)/7] + [ (3+1)/8]
=> (3/7)+(4/8)
=> (3/7)+(1/2)
LCM of 7 and 2 is 14
=> [(3×2)+(1×7)]/14
=> (6+7)/14
=> 13/14
Q-9:-
I) Given that
90×15×20
=> (2×3×3×5)×(3×5)×(2×2×5)
It can be arranged as
=> (2×2×2)×(3×3×3)×(5×5×5)
Now ,
Cube root of 90×15×20
= ³√[ (2×2×2)×(3×3×3)×(5×5×5)]
=> 2×3×5
=> 30
II) Given that
-3375×1000
It can be written as
=> (-15×-15×-15)×(10×10×10)
Now,
Cube root of -3375×1000
= ³√[(-15×-15×-15)×(10×10×10)]
=> -15×10
=> -150
Answers:-
Q-8:-
I) [(3/8)×(4/9)] + [ (5/12)×(1/25)] = 11/60
II) (4/7)+(3/8)-(1/7)+(1/8) = 13/14
Q-9:-
I) Cube root of 90×15×20 is 30
II) Cube root of -3375×1000 is -150