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AlexFokin [52]
3 years ago
6

Simplify 4c2+6c-3c2-2c-3

Mathematics
1 answer:
NikAS [45]3 years ago
6 0
Let's simplify step-by-step.<span><span><span><span><span>4<span>c2</span></span>+<span>6c</span></span>−<span>3<span>c2</span></span></span>−<span>2c</span></span>−3</span><span>=<span><span><span><span><span><span><span><span>4<span>c2</span></span>+<span>6c</span></span>+</span>−<span>3<span>c2</span></span></span>+</span>−<span>2c</span></span>+</span>−3</span></span>Combine Like Terms:<span>=<span><span><span><span><span>4<span>c2</span></span>+<span>6c</span></span>+<span>−<span>3<span>c2</span></span></span></span>+<span>−<span>2c</span></span></span>+<span>−3</span></span></span><span>=<span><span><span>(<span><span>4<span>c2</span></span>+<span>−<span>3<span>c2</span></span></span></span>)</span>+<span>(<span><span>6c</span>+<span>−<span>2c</span></span></span>)</span></span>+<span>(<span>−3</span>)</span></span></span><span>=<span><span><span>c2</span>+<span>4c</span></span>+<span>−3

</span></span></span>Answer: =c2+4c−3
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Complete question is;

Suppose we are testing the null hypothesis H0: μ = 20 and the alternative Ha: μ ≠ 20, for a normal population with σ = 5. A random sample of 25 observations are drawn from the population, and we find the sample mean of these observations is x¯ = 17.6. The P-value is closest to:

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