Write an equivalent expression. Use a commutative law.3 + xy
A. xy + 3, or 3 + yx
B. 3(1 + xy)
C. 3 + x + y
D. 3xy, or 3yx
Answer: A
Mathematics
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Write a statement that represents the relationship between the following.
and 
A. P = Q B. P ? Q C. P ? Q D. P ? Q
Mathematics
Simplify the radical expression. Assume that all variables represent positive real numbers.
A. 25
B. 55
C. 
D. 5
Mathematics
Factor by grouping.12x2 - 20xy + 15xy - 25y2
A. (4x + 5y)(3x - 5y) B. (12x + 5y)(x - 5y) C. (4x + 5)(3x - 5) D. (4x - 5y)(3x - 5y)
Mathematics
Use a calculator to solve.You attend a college and are taking a mathematics class. A total of 30 students are registered for the course. The class is a 5 credit course, and the tuition rate is $30 per credit. What is the total amount of tuition paid by all the students in the class?
A. $4490 B. $900 C. $150 D. $4500
Mathematics