The key phrase is ...less than... This indicates that we should subtract one thing from the other.
... - ...
We are subtracting ten from twice the product of s and t.</q> Ten has to be expressed as a number.
twice the product ofsandt -10
The key phrases on the left-hand side of the subtraction are: twice and the product of. Both of them indicate multiplication. Let's complete our expression.
ten less than twice theproduct of sandt
2 st - 10
Note that this is only one of multiple ways to algebraically express the given verbal expression.
