Find the acute angle, in degrees, between the lines.(1 + 
) x + (1 - 
) y = 17 and 
x + y = 8
A. 45°
B. 30°
C. 60°
D. 75°
Answer: A
Mathematics
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Find the limit and determine if the function is continuous at the point being approached.
cos 
A. Does not exist; no
B. 
; no
C. 
; yes
D. 1; yes
Mathematics
Solve the problem.Midtown Antiques collects 2% sales tax on all sales. If total sales including tax are $1551.17, find the portion that is the tax amount.
A. $31.02 B. $20.42 C. $30.42 D. $1520.75
Mathematics
Given matrix A, find the indicated cofactor.Find A12.A = 
A. 3 B. 21 C. 20 D. -3
Mathematics
Simplify the expression.(
+ 
)(
- 
)
A. 
+ 
- 
- 3
B. 
+ 
+ 
+ 3
C. 
+ 
- 
+ 3
D. 
+ 
+ 
- 3
Mathematics