Simplify the expression. Assume that all variables represent non-negative real numbers.6
- 4
+ 2
A. -10
+ 6
B. -10
+ 18
C. 2
+ 6
D. 6
- 4
+ 18
Answer: A
Mathematics
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Provide an appropriate response.For approximately what values of x can cos x be replaced by 
with an error of magnitude no greater than 
?
A. |x| < 0.19786 B. |x| < 0.26672 C. |x| < 0.20477 D. |x| < 0.14310
Mathematics
Find the root. Assume that all variables represent nonnegative real numbers. 
A. 9x4y2 B. not a real number C. 3x2y4 D. 4.264x2y4
Mathematics
Solve the equation.-7x + 5 + 6(x + 1) = 2x - 3
A. 
B. 
C. {2}
D. 
Mathematics
Solve the combined inequality and graph the solution set. Write the solution in interval notation.-27 ? -4x + 1 ? -7
A. [-7, -2]
B. (-7, -2)
C. (2, 7)
D. [2, 7]
Mathematics