3 years ago

You are having a swimming pool installed. a. Find the perimeter of the swimming pool.

1 answer:

4 0

10x15=1500
$\sqrt{x} \sqrt[n]{x} x_{123} \leq$

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Nataly [62]

using the law of cosines:

a^2 = b^2 + c^2 - 2*b*c*cos(A)

a = 90, b = 55, c = 50

90^2 = 55^2 + 50^2 - 2*55*50*cos(A)

8100 = 3025 + 2500 - 5500 * cos(A)

5500 * cos(A) = 3025 + 2500 - 8100

5500 * cos(A) = -2575

cos(A) = -103/220

A = arccos(-103/220)

A = 117.9 degrees

7 0

4 years ago

navik [9.2K]

Answer:

x=9

Step-by-step explanation:

answers too short so cigdtusrysyksrytf7hiuf6s4td6figiio

7 0

3 years ago

ratelena [41]

Answer: -3 and 3

Step-by-step explanation:

6 0

3 years ago

Butoxors [25]

Your number is 21.
21 divided by 3 is 7. 7 plus -3 is 4.

7 0

3 years ago

Tatiana [17]

so it'd be the first, third and fourth one. all you gotta do is draw a vertical line through the middle of the 1st, 3rd and 4th.

4 0

3 years ago