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Vikki [24]
3 years ago
11

Solve for xplease help! I'm so confused​

Mathematics
1 answer:
WINSTONCH [101]3 years ago
5 0

Answer:

a. x=7

b. x=2

Step-by-step explanation:

We have been given a graph of two circles and we are asked to solve for x.

a. We can see that x and 4 are secants of our given triangle, which intersect outside our given triangle, so we will use intersecting secants theorem to find the value of x.

Intersecting secants theorem states that when two secants intersect outside the circle, then the product of the measures of one secant segment and its external secant segment is equal to the product of the measures of the other secant segment and its external secant segment.

Using intersecting theorem we can set an equation as:

(x+5)*5=(4+6)*6

Let us solve for x.

5x+25=10*6

5x+25-25=60-25

5x=35

Let us divide both sides of our equation by 5.

\frac{5x}{5}=\frac{35}{5}

x=7

Therefore, value of x is 7.

b. Using intersecting secants theorem we can set an equation for our bigger circle as:

(5+3)*3=(x+4)*4

Let us solve for x.

8*3=4x+16

24-16=4x+16-16

8=4x

Let us divide both sides of our equation by 4.

\frac{8}{4}=\frac{4x}{4}

2=x

Therefore, the value of x for bigger circle is 2.

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vfiekz [6]

9514 1404 393

Answer:

  the correct answer is marked

Step-by-step explanation:

The graph ranges vertically between 9 and 15, starting at 9 (the minimum) when x=0. The minimum appears again at x=350.

This means the vertical offset is (9+15)/2 = 12, and the amplitude is (15 -9)/2 = 3. The period is 350, so the coefficient of x is (2π/350). All of the answer choices agree on these parameters.

So, the selection comes down to an understanding of how the sine and cosine curves vary. The sine curve starts at zero and increases from there. The cosine curve starts at its maximum (1) and decreases. Here, the curve starts a its minimum and increases, so could be the opposite of the cosine function.

  y = -3cos(2πx/350) +12 . . . . . . matches choice C

5 0
3 years ago
What is the lateral surface area of the square pyramid below?
den301095 [7]

Answer:

lateral surface area = 48 inches²

Step-by-step explanation:

The picture below is the square base pyramid you are referring. The lateral area is adding the area of the 4 triangles in the pyramid.

area of a triangle = 1/2 × b × h

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lateral surface area = 4 × (1/2 ×  3 × 8)

lateral surface area = 4 × 24/2

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3 0
3 years ago
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5 0
3 years ago
A. the series is absolutely convergent.
Dovator [93]
\displaystyle\sum_{n=1}^\infty\left(1+\frac5n\right)^n

Notice that

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which means the series is divergent. So if this is one of those "select all that apply" questions, then both (c) and (j) are the only choices that do.
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At a local department store, skirts typically cost $15. However, due to a special, the
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3 years ago
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