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Igoryamba
3 years ago
13

Simplify (-4-6i)+(3i)-(8-i) show work please

Mathematics
1 answer:
stich3 [128]3 years ago
4 0
Remove parentheses:

-4 - 6i + 3i - 8 + i
Combine common terms
-12 -2i
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Elijah buys 5 pens and 4 pencils for $18.50. He may also buy 3 pens and 6 pencils for $16.50. How much does one pen cost?
Feliz [49]
Pen's cost = 2.50.
pencil's cost = 1.50
8 0
3 years ago
A standard deck of 52 cards contain four suits clubs spades hearts and diamonds . Each deck contains and equal number of cards i
Kazeer [188]

Answer:

Step-by-step explanation:

I do not know what you mean. What is the question?

8 0
4 years ago
How is "y more than 4 is -36" written and what is the answer ​
Crazy boy [7]

Answer:

y+4=-36 and the answer is y=-40

Step-by-step explanation:

So the word is means equals, meaning we can change it to say

"y more than 4 = -36

and more than means addition so we can put a plus sign there and we get

y+4=-36

then to solve this equation we need to get y by itself on one side and to do that we can move the 4 to the other side by subtracting it on both sides to cancel out the addition and we get y=-40

I hope this helps and please don't hesitate to ask if there is anything still unclear!

8 0
3 years ago
Whats the area of the house and the porch?
My name is Ann [436]

Answer:

The answer is c. 875 square feet

Step-by-step explanation:

3 0
4 years ago
Read 2 more answers
You conduct a simulation regarding which team spectators at a football game support. Your null hypothesis is that there are equa
Llana [10]

Answer:

As the <em>p</em>-value is too small the null hypothesis will be rejected concluding that there is a higher proportion of people supporting the home team.

Step-by-step explanation:

The hypothesis to determine which team spectators at a football game support is:

<em>H₀</em>: There are equal proportions of people supporting the home team and the visiting team, i.e. <em>p</em>₁ = <em>p</em>₂.

<em>Hₐ</em>: There is a higher proportion of people supporting the home team than the visiting team, i.e. <em>p</em>₁ > <em>p</em>₂.

A <em>z</em>-test for difference between proportions can be used to perform the test.

The test statistic is:

z=\frac{\hat p_{1}-\hat p_{2}}{\sqrt{P(1-P)\frac{1}{n_{1}}+\frac{1}{n_{2}}}}}

Th decision rule is:

If the <em>p</em>-value of the test is less than the significance level <em>α </em>then the null hypothesis will be rejected and vice-versa.

The commonly used significance levels are 0.01, 0.05 and 0.10.

The <em>p</em>-value of the test is computed as, <em>p</em> = 0.002.

The <em>p</em>-value of the test is less than all the significance level.

Thus, the null hypothesis will be rejected at any of the three significance level.

Conclusion:

As the <em>p</em>-value is too small the null hypothesis will be rejected concluding that there is a higher proportion of people supporting the home team.

7 0
4 years ago
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