Answer:
Her son is 14 years old
Step-by-step explanation:
5+3x=47
3x=47-5
3x=42
3x÷3=42÷3
x=14
Answer:
Option 1 -
- log Subscript 2 Baseline 9 + 3 log Subscript 2 Baseline x
Step-by-step explanation:
Given : Expression 
To find : Which expression is equivalent to given expression ?
Solution :
Expression 
Applying logarithmic property, 

Using property, 

i.e. log Subscript 2 Baseline 9 + 3 log Subscript 2 Baseline x
Therefore, option 1 is correct.
Answer is 2
Step by step exploration
2+1.25f=10-2.75f
1.25f+ 2.75f=10-2
4f=8
f=2
Your answer would be 5 1/4