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Vadim26 [7]
3 years ago
6

If da is a diameter of circle z and dzc = 2x fins czb

Mathematics
1 answer:
svlad2 [7]3 years ago
6 0
M∠CZB = 73°.

Since DA is a diameter, all of the angles along either side of it will be supplementary (add to 180°).  This means that ∠DZC + ∠CZB + ∠BZA = 180°:

2x + 7x - 4 + 85 = 180

Combining like terms, we have:
9x + 81 = 180

Subtract 81 from both sides:
9x + 81 - 81 = 180 - 81
9x = 99

Divide both sides by 9:
9x/9 = 99/9
x = 11

To find the measure of ∠CZB, substitute 11 in for x:
m∠CZB = 7x - 4 = 7(11) - 4 = 77 - 4 = 73
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Step-by-step explanation:

To find the product, we want to multiply the coefficients and variables.

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Therefore, the product is -14y¹².

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3 years ago
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Answer:

5.46π cm³

Step-by-step explanation:

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If 30 boxes can fit inside these shelves, find the total volume of the boxes.
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Two right triangles, ABD and ACD, were created from ABC by
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Answer:

Since their corresponding angles are congruent and the corresponding sides are in proportion

Step-by-step explanation:

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Sin (B) = (AD ÷ AB) =1

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⇒ AD = AC   (since AD 1 CB).

From triangle ACD,

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Read 2 more answers
The parabola opens upward has x = 2 as an axis of symmetry and contains the non -vertex points (1, 9) and (4, 27) write the equa
Sedaia [141]

Answer:

<h3>               f(x) = 6(x - 2)² + 3</h3>

Step-by-step explanation:

f(x) = a(x - h)² + k    - vertex form of the equation of the parabola with vertex (h, k)

"the parabola opens upward" means:  a>0

"the parabola has x = 2 as an axis of symmetry" means:  h = 2

so f(x) = a(x - 2)² + k

"the parabola contains the point (1, 9)" means:

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9 = a(-1)² + k

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"the parabola contains the point (4, 27)" means:

27 = a(4 - 2)² + k

so:

27 = a(2)² + 9 - a

27 = 4a + 9 - a

3a = 18

a = 6

and  k = 9 - 6 = 3

Therefore the vertex form for this parabola is:

                                     <u> f(x) = 6(x - 2)² + 3</u>

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