Use the given substitution to solve the equation.2x-2 + 5x-1 - 3 = 0, u = x-1
A. - 
, -2
B. - 
, 2
C. 2, -3
D. 2, 3
Answer: B
Mathematics
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Solve and check the equation.0.06 = 0.5x - 7
A. {-13.88} B. {14.12} C. {6.56} D. {3.53}
Mathematics
Solve the system graphically.x + 7y = 77x - 4y = -4
A. (1, 0) B. (0, 1) C. (1, 1) D. (0, 0)
Mathematics
Simplify.
? 
A. 
B. 
C. 
D. 
Mathematics
Use sum-to-product identities to rewrite the expression as a product.cos 21° - cos 41°
A. 2 sin 31° cos 10° B. -2 cos 31° cos 10° C. -2 sin 31° sin 10° D. 2 sin 31° sin 10°
Mathematics