Calculate using the rules for order of operations.?7 + 6? ? 63 + 7
A. 2815
B. 223
C. 2801
D. -2801
Answer: A
Mathematics
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Evaluate.
A. -4 B. -5 C. 4 D. -3
Mathematics
Find the value of d2y/dx2 at the point defined by the given value of t.x = t + cos t, y = 2 - sin t, t = 
A. -2
B. -4
C. -
D. 
Mathematics
Provide an appropriate response.John has been a teacher at West Side High School for the past 12 years. His salary during that time can be modeled by the linear equation y = 800x + 33,000 where x is the number of years since he began teaching at West Side and y is his salary in dollars. Explain what the slope, 800, represents in this context.
What will be an ideal response?
Mathematics
Simplify the expression. If any variables are present, assume that they are positive.
? 
A. x3y8
B. x3y4
C. x3y8
D. x3y9
Mathematics