David has three bags of groceries weighing a total of 25 1/2 pounds two of the bags weigh 7 5/8 pounds and 4 3/4 pounds how much does the third bag weigh? a. 20 6/8 b. 17 7/8 c. 13 1/8 d. 12 2/8 me i do not understand

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)