Answer:
copy and paste
Step-by-step explanation:
Factored form: (x-5)(7x+5) ☺
Let's assume the number be x.
So, sum of a number and 10 can be written as x+10.
Now the given statement is "One half of the sum of a number and 10 ".
So, one half of x+10 can be written as 
She can have 3 groups of tens and 8 groups of ones