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navik [9.2K]
3 years ago
15

Solve using row operations: 3x – 2y + 5z = - 17 2x + 4y - 3z = 29 5x - 6y - 72 = 7

Mathematics
1 answer:
harina [27]3 years ago
6 0

Solutions on pics

  please review if not commet for doubts

The answers are as follows  

pic 1  exc 2

pirc 1 exc 1

pic 3 exc3

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I'm really stuck on these types of equations, can someone please help me solve this
guapka [62]
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prisoha [69]
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6 0
3 years ago
A scientist dropped an object from a height of 200 feet. She recorded the height of the object in 0.5-second intervals. Her data
Reil [10]
The quadratic model is given by:
 y = ax2 + bx + c
 We evaluate three points to find the values of a, b and c.
 We have then:
 For (0, 200):
 200 = a (0) 2 + b (0) + c
 c = 200
 For (0.5, 195):
 195 = a * (0.5) ^ 2 + b * (0.5) +200
 195-200 = a * (0.5) ^ 2 + b * (0.5)
 -5 = 0.25a + 0.5b
 For (1, 185):
 185 = a * (1) ^ 2 + b * (1) +200
 185-200 = a * (1) ^ 2 + b * (1)
 -15 = a + b
 Solving the system:
 -5 = 0.25a + 0.5b
 -15 = a + b
 We have the following results:
 a = -10
 b = -5
 Substituting:
 y = -10x ^ 2 - 5x + 200
 For x = 3 we have:
 y = -10 (3) ^ 2 - 5 (3) + 200
 y = - 90 - 15 + 200
 y = 95
 Answer:
 
the height at 3 seconds is:
 
y = 95 feet
3 0
3 years ago
The golfer hit the ball 6000 yards. How many feet is this?
Norma-Jean [14]

Answer:

18000 ft

Step-by-step explanation:

1 yd = 3 ft

Using conversion factors

6000 yds * 3 ft/ 1 yd = 18000 ft

8 0
4 years ago
Read 2 more answers
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