Answer :

Certainly! Let's solve each part of the question step-by-step.

### Part a) [tex]\( |15 - 2| \)[/tex]

To find the absolute value of the expression [tex]\( 15 - 2 \)[/tex]:

1. First, perform the subtraction inside the absolute value:
[tex]\[ 15 - 2 = 13 \][/tex]
2. The absolute value of 13 is simply the non-negative value of 13:
[tex]\[ |13| = 13 \][/tex]

Therefore, the value of [tex]\( |15 - 2| \)[/tex] is 13.

### Part b) [tex]\( |4 - 9| \)[/tex]

To find the absolute value of the expression [tex]\( 4 - 9 \)[/tex]:

1. First, perform the subtraction inside the absolute value:
[tex]\[ 4 - 9 = -5 \][/tex]
2. The absolute value of -5 is the non-negative value of -5:
[tex]\[ |-5| = 5 \][/tex]

Therefore, the value of [tex]\( |4 - 9| \)[/tex] is 5.

### Part c) [tex]\( |7| \times |-4| \)[/tex]

To find the product of the absolute values [tex]\( |7| \)[/tex] and [tex]\( |-4| \)[/tex]:

1. Calculate the absolute value of 7:
[tex]\[ |7| = 7 \][/tex]
2. Calculate the absolute value of -4:
[tex]\[ |-4| = 4 \][/tex]
3. Multiply these absolute values together:
[tex]\[ 7 \times 4 = 28 \][/tex]

Therefore, the value of [tex]\( |7| \times |-4| \)[/tex] is 28.

In summary:
a) [tex]\( |15 - 2| = 13 \)[/tex]
b) [tex]\( |4 - 9| = 5 \)[/tex]
c) [tex]\( |7| \times |-4| = 28 \)[/tex]