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shutvik [7]
2 years ago
14

(9+x)(9-x) what is the product

Mathematics
1 answer:
Damm [24]2 years ago
7 0
81-9X+9X-X^2= 81 - X^2
Hope it helps
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If roberto can build 1 house in 23 days, how many houses can he build in 207 days?
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3 years ago
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Pythagorean Theorem because it is a right triangle.

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6 0
2 years ago
it is claimed that proportion in favor of proportion A is greater than 60%. A sample of size 100 found 69 in favor. what is the
GenaCL600 [577]

Answer:

The alternative hypothesis is H_1: p > 0.6.

The critical value is Z_c = 1.645

Step-by-step explanation:

It is claimed that proportion in favor of proportion A is greater than 60%.

This means that at the null hypothesis, we test if the proportion is of at most 60%, that is:

H_0: p \leq 0.6

At the alternative hypothesis, we test if the proportion is more than 60%, that is:

H_1: p > 0.6

What is (are) the critical value?

The critical value is the value of Z with a p-value 1 subtracted by the standard significance level of 0.05, since we are testing if the mean is more than a value, so, looking at the z-table, Z_c = 1.645

7 0
2 years ago
What is the the product of (-1 - 3i) and it’s conjugate?
lys-0071 [83]

Answer:

10

Step-by-step explanation:

(-1 - 3i)(-1 + 3i) = 1 - 3i + 3i -9i²

1 - 9i²; i² = -1, therefore 1 - 9(-1) = 1 + 9 = 10

8 0
3 years ago
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