Ions are atoms or groups of atoms with positive or negative electrical charges. The charges of some ions are given. Use these values to find the total charge. 
6 calcium, 13 sodium, and 3 borate
A. +34
B. -8
C. -10
D. +16
Answer: D
Mathematics
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Perform the indicated operations. Simplify the answer.
A. - 
B. 
C. - 
D. 
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Evaluate.Evaluate x + y, if x is 7 and y is 2.
A. 7x + 2y B. 10 C. 14 D. 9
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Use the vertical-line test to determine whether the graph represents a function.
A. Yes B. No
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Write the sentence with symbols, using x to represent the number.The quotient of a number and 5 is -2.
A. 5x = - 
B. 
= -2
C. 
= 5
D. 
= 5
Mathematics