Richard and Teo have a combined age of 31. Richard is 4 years older than twice Teo's age. Write a system of equations. How old are Richard and Teo? I need to write an equation for this, please help

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)