Noah bought 3 books. Each book was the same price. After using a $10-off coupon, the total charge
was $20. Which equation can be used to find b, the
cost of each book?

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

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

Can someone me with this? i’m not sure what to put for my equations.