Let us assume that the age of Janet's sister is = x
Then the age of Janet = x + 5
Now we also know that their combined age is equal to 51 years. Then we can write the equation as
x + (x + 5) = 51
2x + 5 = 51
2x = 51 -5
2x = 46
x = 46/2
= 23
So the age of Janet = x + 5
= 23 + 5
= 28 years
So the age of Janet's sister is 23 and Janet's age is 28
Answer:
1.5
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Step-by-step explanation:
Answer: 5/8
Step-by-step explanation:
This fraction is talking about a whole, so 3/8 + x = 1.
Knowing this, we just do 1 - 3/8, which is 5/8.
Answer:
the atoms can have different numbers of valence electrons
