Ms. Teller surveyed the 35 students in her class about their families. 29 students have a brother or a sister, 15 students have a brother, and 9 students have both a brother and a sister. How many students have only a sister?
a. 17
b. 26
c. 23
d. 25
c. 23
Mathematics
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Factor when possible. If the polynomial is prime, so state.49x2 - 81
A. (7x + 9)(7x - 9) B. (7x + 9)2 C. (7x - 9)2 D. prime
Mathematics
Find the exact value of the trigonometric function.csc 
A. - 
B. -1
C. - 
D. - 
Mathematics
Find the real solutions of the equation by factoring.3x5 = 147x3
A. {0}
B. {-7, 0, 7}
C. {-7, 7}
D. {-7
, 0, 7
}
Mathematics
Plot the set of points on the real number line.
A. 
B. 
C. 
D. 
Mathematics