Please help me this question

Run a linear regression to determine an equation (y=mx+b y=mx+b)

In the figure, triangle aob and triangle boc form a linear pair ,find the measure of x

Eric and shiloh each have a savings account. the ratio of eric’s account balance to shiloh’s account balance is 4: 3. together they have a total of $140 in their accounts. use the tape diagram below to you determine the balance of eric’s account.