6x+7=-5 what does x equal

What is the y-intercept of the graph of the equation y=3(2^x)

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*