Write the phrase as a variable expression. Use x to represent "a number."21 less a number
A. x - 21
B. 21 - x
C. 
D. x + 21
Answer: B
Mathematics
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Solve the equation.ex - 1 = 
x + 3
A. 
B. 
C. 
D. 
Mathematics
Graph the equation.
+ 
= 1
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.A student tries to solve 
= 
+ 4 by squaring both sides and gets 
Why is this not correct?
What will be an ideal response?
Mathematics
Multiply. Write a mixed numeral for the answer.-3 ? 3
A. -10
B. -11
C. -9
D. -9
Mathematics