4b=a then plus 10 to see if the age holds true to 3b=a in ten years. Then since the question is how old is she today? You must either add 6 to young age (of20) or minus 4 from the older (of 30).
So Betty would be 26 today.
The third one is the answer for this question
Yes because 3*5 = 15
Factors multiply to get the product.
Answer:
49
Step-by-step explanation:
