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Gelneren [198K]
3 years ago
5

Please help im so confused

Mathematics
1 answer:
MArishka [77]3 years ago
3 0

Answer:

i

Step-by-step explanation:

i = \sqrt{-1}

i^2 = -1

i^3 = -i

i^4 = 1

(Make sure you know your exponent rules)

i^4^1 = i^4^0 * i = (i^1^0)^4 * i \\i^4 = 1 \\i^1^0 * i *1 \\i^1^0=1\\1*1*i=i

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Give a counterexample for the statement: 'All square roots are irrational numbers'. Explain your reasoning.
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A counterexample for the statement 'All square roots are irrational numbers.' is the square root of 9.  This is because when simplified, the answer is 3.  

For a number to be irrational, it can't be expressed in fractional form.  However, 3 can be expressed in fractional form as 3/1.
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In their first 5 games last year, the Dallas Cowboys scored 35, 31, 31, 10, and 24 points. How many points did the Cowboys avera
Anna71 [15]

Answer:

26.2 points

Step-by-step explanation:

To find the average, find their total number of points and divide by the number of games

total points/number of games

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Then, divide by the number of games (5)

131/5=26.2

So, they scored an average of 26.2 points

Hope this helps! :)

5 0
3 years ago
Imagine that * represents a new operation so that a * b means to double a, and then add b. For example, 2 * 10 = 14. What is -3
Rudik [331]

Answer:

C 2

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
THIRD TIME ASKING FOR HELP PLEASE HELP ME!!!!!!!!!!!!!!!!!!!
Fed [463]
<h3>Answer:  9 units</h3>

========================================================

Explanation:

For now, focus on triangle ABD. This is a right triangle due to BD being an altitude.

Use the pythagorean theorem to find that...

(AD)^2 + (BD)^2 = (AB)^2

(1)^2 + (BD)^2 = (3)^2

1 + (BD)^2 = 9

(BD)^2 = 9-1

(BD)^2 = 8

Normally we would isolate BD itself, but I'll stop short and use that last line instead.

------------------

The triangles ABD and BCD are similar triangles (we can prove this using the AA similarity theorem).

Since we have similar triangles, we can form the proportion shown below

AD/BD = BD/CD

This cross multiplies to

AD*CD = (BD)^2

We know that AD = 1 and (BD)^2 = 8, so,

AD*CD = (BD)^2

1*CD = 8

CD = 8

This then means,

x = CD+DA

x = 8+1

x = 9

AC is 9 units long.

8 0
2 years ago
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