The numerical length of ST is 8
<h3>How to determine the numerical length of ST?</h3>
The given parameters are:
ST = 5x - 7
RT = 4x + 9
RS = 2x + 7
To calculate the length ST, we use the following equation
RT = RS + ST
Substitute the known values in the above equation
4x + 9 = 5x - 7 + 2x + 7
This gives
4x + 9 = 7x
Evaluate the like terms
x = 3
Substitute x = 3 in ST = 5x - 7
ST = 5 * 3 - 7
This gives
ST = 8
Hence, the numerical length of ST is 8
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