Answer:

Step-by-step explanation:

So,
5y*3 is the open phrase the student uses to model "the sum of 5y and 3".
"The sum of" means addition. The student put 5y*3, while the sum of 5y and 3 is actually 5y + 3.
Answer:
9
Step-by-step explanation:
3/8 × 24
= 3 × 3
= 9
9 Hours
3y (y is the unknown number but it represents one number only... and also 3y represents 3 multiply by y)