Solve the proportion for the given variable. Round the solution where indicated.
= 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Let A and B be sets with cardinal numbers, n(A) = a and n(B) = b, respectively. Decide whether the statement is true or false.n(A ? B) = n(A) + n(B) - n(A ? B)
A. True B. False
Mathematics
Divide. Write with positive exponents.
A. 2x3 + 24x8 - 15x6 + 15x4 + 8x3
B. 2x3 + 8x2 - 5
C. 6x9 + 8x2 - 5 + 
+ 
D. 2x3 + 8x2 - 5 + 
+ 
Mathematics
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Solve.A picture frame has a perimeter of 52 in. and a diagonal of 
in. What are the dimensions?
A. 8 in. by 19 in. B. 8 in. by 20 in. C. 7 in. by 18 in. D. 7 in. by 19 in.
Mathematics