6. David bought 3 DVDs for 4 books for $40 at a yard sale. Anna bought 1 DVD and 6 books for $18. How much did each DVD and book cost?

Find the value of x. give reasons to justify your solutions! c ∈ ae

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.