How is the sentence "9 less than x is -1" written as an equation?
A. 9-x=-1
B. x-9=-1
C. x-9=1
D. x-1=9
Is the answer B?
Right,
A. 9-x=-1
No, the correct answer is A. "9 less than x is -1" can be written as the equation 9 - x = -1.
To write the sentence "9 less than x is -1" as an equation, we need to understand that "less than" translates to subtraction in mathematics.
So, if we want to express "9 less than x," we need to subtract 9 from x.
Therefore, the correct equation would be 9 - x = -1, where 9 is being subtracted from x to give us -1.
Thus, the correct answer is A, not B.