2(x + 16) + 4(x - 5) simplifies to
a(x+b)
Work out the values of a and b.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?

Me with these questions , i don’t understand scientific notation!