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jeka94
3 years ago
11

If you're good at trig please help meeeee Show full working out ;)

Mathematics
1 answer:
Trava [24]3 years ago
7 0

We break down the area into two triangles - since we're given all their side lengths, we use Heron's formula: [area]=\sqrt{s(s-a)(s-b)(s-c)}, where s=\frac{a+b+c}{2}

[ABD]=\sqrt{(265)(115)(85)(65)}\approx 12975.92

[CBD]=\sqrt{(225)(125)(75)(25)}\approx 7261.84

[ABCD]=[ABD]+[CBD]\approx\boxed{20238\,\text{m}^2}.

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Which expression has a value of 3?
Marina86 [1]

Step-by-step explanation:

3(4 *to the power of 2* - 3*to the power of 2*)

  • 3(4²-3²)
  • 3(16-9)
  • 3(7)
  • 21

24-23 x 3

  • 24-23×3
  • 24-69
  • -45

3*to the power of 3* - 3*to the power of 2

  • 3³-3²
  • 9-6
  • 3

(6*to the power of 2* - 3) (9*to the power of 2* - 70)

  • (6²-3)(9²-70)
  • (36-3)(81-70)
  • (33)(11)
  • 363

Hence, Option d. is the correct answer because it gives answer 3 when it is solved.

6 0
3 years ago
Find the distance from the point (-4, 4) to the line y=-2x+1 . Round your answer to the nearest tenth.
kati45 [8]

Answer:

5 units.

Step-by-step explanation:

In order to find the distance between the line y = -2x + 1 and the point (-4, 4), we need to find the position of the line at x = -4. Shortest distance between two objects is a straight line, right?

So y = -2(-4) + 1 = 9; (-4, 9).

Finding the distance between (-4, 4) and (-4, 9) gives us the answer of 5.

5 0
3 years ago
Read 2 more answers
What is the missing reason for the 3rd step in the proof below?
Firlakuza [10]

Answer: B

Step-by-step explanation:

Because m<7 and m<6 share a vertex and doesn’t share any common sides and they are across from each other which means they are vertical and vertical angles are congruent

7 0
3 years ago
Find the distance UV between the points U(4,−2) and V(6,−1). Round your answer to the nearest tenth, if necessary.
Liono4ka [1.6K]

The horizontal distance is the difference of x-coordinates: 6 - 4 = 2.

The vertical distance is the difference of y-coordinates: -1 - (-2) = 1.

The straight-line distance (d) can be found using the Pythagorean theorem, since the vertical and horizontal distances are at right angles to each other.

.. d² = 2² + 1² = 5

.. d = √5 ≈ 2.2

The distance UV is about 2.2.

8 0
3 years ago
For their CD collections, Alan, Tom, and Barbara have a total of 52 CD’s. If Barbara had 6 more, then she would have as many a
Anestetic [448]
<span>its C. Alan has 13 CDs, Tom has 16 CDs, Barbara has 23 CDs !</span>
8 0
4 years ago
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