Answer:
81
Step-by-step explanation:
9*(x + y) = 10x + y
9x + 9y = 10x + y
0 = x - 8y
8y = x
=======
y = 1
x = 8
x + y = 8 + 1 = 9
9*9 = 81
So 81 is 9 times the sum of it's digits.
Answer: 17:550
Step-by-step explanation: 102/3300 divide both numbers by 2 .
51/1650 divide both numbers by 3
Step-by-step explanation:
Given that:
[{5² × 6²}/{(30)⁴}]³
⇛[{5² × 6²}/{(5 × 6)⁴}]³
⇛[{5² × 6²}/{(5⁴ × 6⁴}]³ [∵(ab)ᵐ= aᵐbᵐ]
⇛[{5²/5⁴} × {6² × 6⁴}]³
⇛[5^(2-4) × 6^(2-4)]³ [∵aᵐ/aⁿ = aᵐ-ⁿ]
⇛[5^-2 × 6^-2]³ [∵aᵐbᵐ = (ab)ᵐ]
⇛[(5×6)^-2]³
⇛[30^-2]³
⇛[30]^-2×3 [∵(aᵐ)ⁿ = aᵐⁿ]
⇛30^-6. [∵(a^-ⁿ = 1/a^n]
⇛1/(30)⁶ ≈ 72 90 00 000 Ans.
Hope this helps!!
If you have any doubt, then you can ask me in the comments.
The blue one.
1/3= 33 1/3%
33 1/3% • 2 = 66 2/3%
Ratio of A's: 3/11
Ratio of B's: 4/11
Ratio of C's: 5/11
Ratio of D's: 1/11
