math
posted by Kelly .
(parent). My son's problem says "the product of a number and 17"...supposed to write as expression... I'm thinking it would be a 17x=y but he's adamant that because the word "and" is in the sentence that he needs to add something as well.... (no math books provided by school so I can't look it up) Please give me correct way to write it

You are correct.
Ask him about these statements. The product of 2 and 4 is 8. We could also write it 2 times 4 equals 8. 
No you are right. : 17x=y
that sentence means a number is multiplied by 17. since the number is unknown you would use "x". and it will give you your result "y".