Solve by addition or substitution.x + y = -10x - y = -4
A. (7, -2)
B. (-7, -3)
C. (-8, -2)
D. ?
Answer: B
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?Which of the following does not indicate the concept of subtraction?
A. ?The difference of a number and 5.
B. ?n less than m.
C. ?How much larger is 11 than 5?
D. ?n increased by m.
E. How much was paid in rent in September?
| September Payment | October Payment | Total Payments | |
| Payment Toward Rent | $552 | $1,393 |
Use the order of operations to simplify the expression.(7 + 4)[3 + (5 + 5)]
A. 364 B. 143 C. 784 D. 41
Prove that the equation is an identity.ln(cot ?) = ln(cos ?) + ln(csc ?)
What will be an ideal response?
Find all the complex roots. Leave your answers in polar form with the argument in degrees.The complex fifth roots of 
+ i
A. 
(cos 30° + i sin 30°), 
(cos 102° + i sin 102°), 
(cos 174° + i sin 174°), 
(cos 246° + i sin 246°), 
B. 
(cos 6° + i sin 6°), 
(cos 78° + i sin 78°), 
(cos 150° + i sin 150°), 
(cos 222° + i sin 222°), 
C. 32(cos 30° + i sin 30°), 32(cos 102° + i sin 102°), 32(cos 174° + i sin 174°), 32(cos 246° + i sin 246°), 
D. 32(cos 6° + i sin 6°), 32(cos 78° + i sin 78°), 32(cos 150° + i sin 150°), 32(cos 222° + i sin 222°), 