Solve the system by graphing.x - y = 4x + y = 4
A. (0, - 4)
B. (- 4, 0)
C. (0, 4)
D. (4, 0)
Answer: D
Mathematics
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Solve the problem.A particle is moving so that its x- and y-coordinates are given by 
and 
(in ft). Find the magnitude and direction of its velocity when 
A. 12 ft/s, 290° B. 3.0 ft/s, 110° C. 12 ft/s, 110° D. 4.0 ft/s, 70°
Mathematics
Use exponential notation to write the repeated multiplication.8 ? 8
A. 2 ? 8 B. 83 C. 28 D. 82
Mathematics
Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.x3/8 ? x5/8
A. x
B. x15/64
C. x15/8
D. 
Mathematics
Find the slope and y-intercept of the line.4x - 5y = 7
A. slope = 
; y-intercept = 
B. slope = 4; y-intercept = 7
C. slope = 
; y-intercept = - 
D. slope = 
; y-intercept = 
Mathematics