Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(7, 28)}
B. 
C. {(2, 4)}
D. no solution; ?
Answer: D
Mathematics
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Factor out the GCF from the polynomial.5t2 - 20t - 15
A. 5(t2 - 15t - 10) B. 5(t2 - 4t - 3) C. 5(t2 - 20t - 15) D. 5t(t2 - 4t - 3)
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Decide whether the statement is true or false.
= 
? 
= 
A. True B. False
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Find the product. Write the answer in standard form.5i(6 - 5i)
A. - 30i - 25i2 B. 30i + 25i2 C. 30i - 25 D. 25 + 30i
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Use the given information to find the exact value of the trigonometric function.sin ? = 
; tan ? > 0
Find cos 
.
A. 
B. 
C. 
D. 
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