A cook spent $12.30 to purchase the ingredients for a cake. One-third of the cost was for icing ingredients. How much did the icing ingredients cost? (Can y'all please help me on number 4,5,6,7,8,9, and 10

4. Steps:
.......Find least common denominator
.......Add numerators
.......Simplify

1/4 + 1/2 + 2/3 .....
........12 is least common denominator
....... multiply numerator and denominator by same number

1/4 4×3=12 so multiply 1/4 × 3/3 = 3/12
1/2 2×6=12 so multiply 1/2 × 6/6 = 6/12
2/3 3×4=12 so multiply 2/3 × 4/4 = 8/12

ADD: 3/12 + 6/12 + 8/12 = 17/12
SIMPLIFY: 17/12 = 1 5/12 CUPS of sugar

5. Total cost:$12.30
..Icing Costs: 1/3 of Total

Equation (of means multiply):

1/3 × 12.30= N
12.30/3 = N
4.10= N
Icing Supplies Cost $4.10

6. Students: 25
.....1/5 of students
..... ate 1/8 of cake
..... How much cake is left?
In order to determine how much cake was eaten, you first need to know how many students ate it

1/5 × 25= 25/5 = 5

So 5 students ate 1/8 of cake each. So how much cake was eaten

5 × 1/8 = 5/8

cake had 8/8 pieces from which 5/8 was eaten. How much left?

8/8 - 5/8 = 3/8

so 3/8 of cake is left.

7. 3/4 × 3 = 9/4 = 2 1/4

8. Eggs 3/4 of dozen
...... Dropped 1/3 of 3/4 of dozen

3/4 × 12 = 36/4 = 9 eggs needed
1/3 × 9 = 9/3 = 3 eggs dropped

9-3=6 eggs left

9.