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Morgarella [4.7K]
4 years ago
14

Find k such that the equation kx^2+x+25k=0 has a repeated solution.

Mathematics
1 answer:
Paha777 [63]4 years ago
4 0
Ill try to answer your question
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A circle is cut into congruent sections and arranged to form a figure that approximates a parallelogram. Find the approximate he
Solnce55 [7]

Answer:

<h2>The height is 3.43 centimeters, approximately.</h2>

Step-by-step explanation:

Notice that there are 16 pieces from the circle, which means each sector has an angle of

\theta = \frac{360\°}{16}=22.5\°

Where all sectors have equal area.

Now, the area of the whole circle is 12.25 \pi \ cm^{2}, if we use the formula of its area, we'll find the radius of the circle

A= \pi r^{2}\\ 12.25\pi = \pi r^{2}\\ r=\sqrt{12.25} \approx  3.5

Notice that each piece works as an isosceles triangle, because each side is the radius, that is, they have the same length. So far, we know the sides of the isosceles triangle and one internal angle.

To find the height of the one piece, we need to use trigonometric reasons, because the height divides a triangle in two equal right triangles.

cos(11.25\°)=\frac{h}{3.5}\\ h=3.5 \times cos(11.25 \°)\\h \approx 3.43

Therefore, the height is 3.43 centimeters, approximately.

6 0
3 years ago
What is the volume of the extra large tube
Fantom [35]

If by base of 10, you mean that the diameter of the base is 10, then the radius of the base is 5.

volume = pi * r^2 * h

volume = pi * 5^2 * 10

volume = 250pi, or approximately 785

6 0
3 years ago
What is the answer to these two problens
makkiz [27]
1. 64
2. 81
i hope this helped!
6 0
3 years ago
3. Solve the formula 12 = - 2x + 3y<br> Show work
Cloud [144]

Answer:

x=3/2y−6

y=2/3x+4

Step-by-step explanation:

Let's solve for y.

12=−2x+3y

Step 1: Flip the equation.

−2x+3y=12

Step 2: Add 2x to both sides.

−2x+3y+2x=12+2x

3y=2x+12

Step 3: Divide both sides by 3.

3y/3=2x+12/3

5 0
3 years ago
30% of 50 is___<br><br>plss answerr
Bumek [7]

Answer:

15 is 30 percent of 50 hope this helps

8 0
3 years ago
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