Solve the following: 1) 5 3/4 - 7(2 1/2 + 1 1/3); 2) Find three consecutive numbers that add up to 87.

Find a common denominator, which is 12.

The answer can also be expressed as a mixed number:

The final answer is $\boxed{-\frac{253}{12}}$.

10)

Let the first number be $x$.
The second number is $x+1$.
The third number is $x+2$.

First number: 28
Second number: $28+1 = 29$
Third number: $28+2 = 30$
The final answer is 28, 29, and 30.

11)

Divide by 2:

Divide by 2 again:

Divide by 2 again:

The final answer is $\boxed{\frac{39}{125}}$.

14)

The final answer is $\boxed{16.6}$.

15)

a) Determine the fraction that represents the cost of each bunch of vegetables.

The ratio of carrots : spinach : onions is 2 : 4 : 3.
Total parts = $2 + 4 + 3 = 9$.

Fraction for carrots = $\frac{\text{Carrots ratio part}}{\text{Total ratio parts}} = \frac{2}{9}$
Fraction for spinach = $\frac{\text{Spinach ratio part}}{\text{Total ratio parts}} = \frac{4}{9}$
Fraction for onions = $\frac{\text{Onions ratio part}}{\text{Total ratio parts}} = \frac{3}{9}$

The fractions representing the cost of each bunch of vegetables are:

• Carrots: $\boxed{\frac{2}{9}}$
• Spinach: $\boxed{\frac{4}{9}}$
• Onions: $\boxed{\frac{3}{9}}$