Answer:
She can make 6 cakes in a day and she can make 30 cakes in 5 days.
Explanation:
To find how many birthday cakes can Mariam make in 1 day. You have to divide the number of birthday cake she can make in a week by 7. (You divide it by 7 because there are 7 days.) 42 divided by 7 = 6
To find how many birthday cakes can Mariam make in 5 days. You have to multiply the number of birthday cake she can make in a day by 5. (You multiply it by 5 because there are 5 days.) 5 x 6 = 30