Answer the question or complete the sentence to make a true statement.According to the rules for the order of operations, what should be the first step when simplifying the expression [9 + (-5 + 4)] + (-6)?
A. Find the sum of 9 and -5
B. Find the sum of -5 and 4
C. Find the sum of 9 and -6
D. Find the sum of 4 and -6
Answer: B
Mathematics
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Simplify the polynomial by combining like terms: - 7r + 6t - s - 5r + 12s + 4t - t + 5s - r.
a.13r + 16s + 9t b. -13r -16s + 9t c. -13r + 16s + 9t d. -13r -16s -9t
Mathematics
Choose the best answer.The area of a lake is about
A. 2 km2 B. 2 cm2 C. 2 m2 D. 2 dm2
Mathematics
Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. ln 
- 
tan-1 
+ C
B. ln 
- 
+ C
C. - 
tan-1 
- 
+ C
D. ln 
- 
tan-1 
- 
+ C
Mathematics
Determine whether the graphs of the equations are parallel lines, perpendicular lines, or neither.y = 3x - 59x + 3y = 8
A. Parallel B. Perpendicular C. Neither
Mathematics