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motikmotik
3 years ago
6

(Sin5A/sina)-(cos5A/cosA)=4cos2A

Mathematics
1 answer:
Sonja [21]3 years ago
8 0
Is there any way you could explain this to me?
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What is i^34?<br><br>A. -i<br>B. 1<br>C. -1<br>D. i<br>​
babymother [125]

Answer:    C -1

calculate it from i and imaginary numbers

4 0
3 years ago
You randomly draw a marble out of a bag containing 4 green marbles, 6 blue marbles, 8 yellow marbles, and 2 red marbles. Find th
shutvik [7]

Answer:

<h3>The probability is </h3><h3>\frac{3}{5}</h3>

Step-by-step explanation:

Green marbles = 4

Blue marbles = 6

Yellow marbles = 8

Red marbles = 2

4 + 6 + 8 + 2 = 20 \: marbles

The probability of drawing marble not yellow:

4 + 6 + 2 = 12 \\  \frac{12}{20}  =  \frac{3}{5}

Brainliest please.

5 0
2 years ago
The opening of the tunnel can be modeled by the graph of the equation y=-0.18x^2+4.4x-12 where x and y are measured in feet. Fin
Molodets [167]
1. To find the vertex of a parabolla whose equation is written in the standard form, you must apply the following proccedure:
 
 2. You have:
 
 y=-0.18x²+4.4x-12 
 
 a=-0.18
 b=4.4
 
 3. You must apply the following formula:
<span> 
 x=-b/2a
 x=-4.4/2(-0.18)
 x=-4.4/-0.36
 x=12.22
 
 4. When you susbtitute x=12.22 into the equation </span>y=-0.18x²+4.4x-12, you obtain:
 
 y=-0.18x²+4.4x-12
 y=-0.18(12.22)²<span>+4.4(12.22)-12
</span> y=14.88 feet
 
 5. The answer is: The maximum height of the tunnel is <span>14.88 feet</span>
5 0
3 years ago
Find the areas of the trapezoids. PLZ HELP!!!!
barxatty [35]

Answer:

<em>Type 7.5 in the box!</em>

Step-by-step explanation:

Consider the trapezoid formula ( ( base 1 + base 2 ) / 2 ) * height;

Length of Base 1 - 1 unit,\\\\Length of Base 2 - 4 units,\\\\Length of Height - 3 units ( length of x - intercept in shaded region )\\\\Area of Trapezoid = ( Average of Bases ) * Height = ( ( 1 + 4 ) / 2 ) * 3 = ( 5 / 2 ) * 3 = 7.5 square units,\\\\Solution; 7.5 square units

<em>Area = 7.5 square units</em>

4 0
3 years ago
You earned a 84% on a science test. You answered 21 questions correctly. How many questions were on the test?
sergij07 [2.7K]
20 x .80 = 16 
So the answer would be 16. 
I hope this helps :)
6 0
3 years ago
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