add the adjacent numbers together and write their sum above them. continue until you have completed the last block in the pyramid

Find the solution of system of equation y= x-4 y=4x+2

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?