Solve the system of linear equations and check any solution algebraically.
a. 
b. 
c. 
d. 
c.
Mathematics
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Perform the indicated operations and write the answer in the form 
where a and b are real numbers.6i + (-8 - i)
A. 8 - 5i B. -8 + 5i C. -8 + 7i D. 8 - 7i
Mathematics
Add or subtract. 
+ 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A garage owner wants to fill a 55-gallon drum with a 20% winter mixture of antifreeze for his customers. How many gallons of 100% antifreeze should he mix with some 10% antifreeze mixture in order to fill the drum?
A. 48
gallons
B. 19
gallons
C. 35
gallons
D. 6
gallons
Mathematics
Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in the ordered pair form.
A. {(3, 8)} B. {(3, 9)} C. {(2, 9)} D. {(2, 8)}
Mathematics