Find the solutions to the system of equations by the addition method.
+ 
= 4
- 2y = 21
A. (-6, -8)
B. (-6, 8)
C. (6, 8)
D. (6, -8)
Answer: D
Mathematics
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Find the first 4 terms of the recursively defined sequence.a1 = -1, an + 1 = 2 ? an
A. -2, -4, -8, -16 B. 0, 5, -5, 0 C. -1, -2, -4, -8 D. -1, -5, 0, 5
Mathematics
Solve the problem.The lifespan for a pair of walking shoes is normally distributed with a mean of 
steps and standard deviation of 
steps. If a manufacture produces 6000 pairs of these shoes, how many can be expected to last for at least 732,800 steps?
A. ? 1391 pairs B. ? 1313 pairs C. ? 1205 pairs D. ? 1271 pairs
Mathematics
Solve the equation and check your solution.4.8 = x + 1.2
A. 4.00 B. -3.6 C. 3.6 D. 6.0
Mathematics
Provide an appropriate response.
Why could (-5, -4) not be a solution of the system that is graphed?
What will be an ideal response?
Mathematics