Answer:
x = -2y - 4
Step-by-step explanation:
x + 2y = -4
Subtract 2y from both sides.
x = -4 - 2y
Answer:
32.485
Step-by-step explanation:
24+6root2
Answer: 21120 feet.
Step-by-step explanation: We start with the fraction 1/180, found by putting 20 seconds over one hour. Then, we need to get the amount of miles the speed of sound travels in 20 seconds. We can use the fraction above as a ratio to get it. 720/1 x 1/180 = 4 miles. Then, we'll just do 4 times 5280, which is 21120.
The sum of interior angles of a triangle is always* 180°, so the following triangles are possible:
- 90°, 40°, 50°
- 82°, 38°, 60°
- 59°, 31°, 90°
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The following are not possible triangles.
- 65°, 25°, 75° — add to 165° ≠ 180°
- 57°, 70°, 33° — add to 160° ≠ 180°
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* in plane Euclidean geometry. There are other topologies such that the sum of angles of a triangle differs from 180°.
