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Allushta [10]
2 years ago
11

PLZ HELP :) here's the problem !​

Mathematics
1 answer:
Pavlova-9 [17]2 years ago
3 0

Answer: I think the answer is 34.. sorry if I’m wrong

Step-by-step explanation:

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Simplify: 8i^7+6i^5-5i^3-3i^2-7i-9
Dmitry_Shevchenko [17]
<span>Consider the remainder of the division of the power exponent of i by 4.
For a remainder r equal to 0, 1, 2 or 3, we have a power equal to 1, i, -1 or -i respectively, therefore:

</span>8i^7+6i^5-5i^3-3i^2-7i-9 =
8*(-i) + 6*i - 5*(-i) - 3*(-1) - 7i - 9 =
- 8i + 6i + 5i + 3 - 7i - 9 =
3 - 9 - 8i + 6i + 5i- 7i =
=\boxed{- 6 - 4i}

Answer:
\boxed{- 6 - 4i}

<span>

</span>
5 0
3 years ago
The diameter of a clock's face is 6 inches. Find the length of the mirror arc formed by the hands of the clock at 4:00. Round to
Genrish500 [490]
We know that

360°/12 hour-----------> 30°/hour

<span>Central angle at 4 .00 is 120 degrees

the radius of a clock is 6/2-----> r=3 in
length of a circumference=2*pi*r-----> 2*pi*3----> 18.84 in

the minor arc at 4 .00 is  for a central angle of 120</span>°
so
if 360° (full circle)---------> has a length of 18.84 in
 120°----------------------> X
X=120*18.84/360-------> X=6.28 in

the answer is
6.28 in
6 0
3 years ago
What is the range of the function graphed below?<br> ABCD
AlexFokin [52]

Answer:

(-4 , 0] ∪ (2, ∞)

Last option

Step-by-step explanation:

Since range is included 2 so (2, ∞) and other line is not included 0 but included -4  so it should be (-4, 0]

So range would be:

(-4 , 0] ∪ (2, ∞)

8 0
3 years ago
What is the reference angle for π/6
Artemon [7]

Answer:

Step-by-step explanation:

π/6 is its own reference angle; it's positive and between 0 and π/2.

8 0
3 years ago
Explain the process of solving inequality with variables on both sides. Show an example.
elena-14-01-66 [18.8K]

Answer:

Inequalities work exactly like equations with one exception. The process begins just like equations: first, do the opposite of what you see, then do the same thing on the other side of the sign. At the last step of solving an inequality, if you multiply or divide by a negative number, then you reverse the sign

3 0
3 years ago
Read 2 more answers
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