Simplify the expression. Assume all variables represent positive real numbers.
+ 
A. 7
B. 21
C. 
D. 10.5
Answer: B
Mathematics
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Remove parentheses and simplify the expression.[5(x - 3) - 8] + [5(x - 1) + 5]
A. 10x - 8 B. 5x - 28 C. 10x - 23 D. 10x - 11
Mathematics
Use a grapher to find the vertex or x-intercepts, as indicated, of the quadratic function.Find the vertex of the function f(x) = x2 + x - 5.
A. (-0.5, -5) B. (-0.5, -5.25) C. (0.5, -5.25) D. (0.5, -4.75)
Mathematics
Solve the system using elimination.4x + 
y = 132x + 
y = 
A. (-4, -5) B. (5, -5) C. (4, -4) D. empty set; inconsistent system
Mathematics
Find an equation for the line with the given properties.Perpendicular to the line 5x + 8y = -109; containing the point (-9, -3)
A. 8x - 5y = -57 B. 5x - 8y = -57 C. 8x + 5y = -57 D. 8x + 5y = -109
Mathematics