Use the commutative and/or associative property of addition and then simplify.3 + (y + 7)
A. 7y + 3
B. 10
C. y + 10
D. y + 21
Answer: C
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Solve the problem.A picture 11 inches by 17 inches is to be mounted on a piece of matboard so that there is an even amount of mat all around the picture. How wide will the border be if the area of the picture and border is 315 square inches?
A. 4.5 in. B. 2 in. C. 3 in. D. 4 in.
Find the mean, median, and mode for each set of numbers.39.74, 32.44, 30.43, 32.51, 38.34, 38.34
A. Mean = 35.6, Median = 35.428, Mode = 38.44 B. Mean = 35.3, Median = 35.425, Mode = 38.34 C. Mean = 35, Median = 35.428, Mode = 38.44 D. Mean = 35, Median = 35.425, Mode = 38.44
Find the exact value of the sum.sin 
- sin 
A. - 
B. - 
C. - 
D. - 
Tell which set or sets the number belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.8.97
A. rational B. rational, real C. real D. natural, rational, real