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Nonamiya [84]
3 years ago
12

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x

-y+3z = 12 x+4y+6z =-32 5x+3y+9z = 20

Mathematics
1 answer:
Kisachek [45]3 years ago
7 0
You should find that your system doesn't have solutions. This is also confirmed by the fact that the determinant of the matrix of the coefficient of the variables x, y and z is equal to zero.

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The cost price of a wrist watch of 2500 at 25% gain what’s the selling price
Lyrx [107]

Answer:

The selling price is $3,125

Step-by-step explanation:

25% of 2500 is 2500 x 0.25 = 625

You will be adding the 25% gain to cost price to find the new price

2500 + 625 = 3125

7 0
2 years ago
Read 2 more answers
What is the answer to this question?
Serjik [45]

Answer:

For 2 hours of dog stinting the total cost will be the same for the two services.

Step-by-step explanation:

x to represent the number of hours of dog sitting

<u>Derrick's Dog Sitting </u>

Fixed charged rates  = $12

Sitting charges per hour  = $7

⇒Charges for x hours siting = x ( Charges per hour)

= x ( $7)  = 7x

⇒Total charges of Derrick's Dog Sitting  for x hours  = Fixed charge + Hourly Rate

= $7x + 12

<u> Darlene's Dog Sitting</u>

Fixed charged rates  = $16

Sitting charges per hour  = $5

⇒Charges for x hours siting = x ( Charges per hour)

= x ( $5)  = 5x

⇒Total charges of Darlene's Dog Sitting<u> </u>for x hours  = Fixed charge + Hourly Rate

= $5x + 16

Now, according to the question:

for x hours sitting, both company charges are same.

⇒ $7x + 12  =  $5x + 16

or, 7x - 5x = 16 - 12

or, 2x = 4

⇒ x =  2

Hence, for 2 hours of dog stinting the total cost will be the same for the two services.

5 0
4 years ago
Gannets start their dive at 30 meters above sea level. They plunge at a speed close to 100 km/hr, diving 21 meters below the sea
Reil [10]

Step-by-step explanation:

30+21= 51 meters

I think this is the answer

3 0
3 years ago
Enter your answer as a simplified mixed number. B - 1/4 = 6 1/2
IrinaK [193]
The answer is B = 6 3/4. Please mark as brainliest if it did help and have a nice day!
6 0
4 years ago
How many miles per hour is this? (one furlong is 18 mile, and a fortnight is 14 days. a furlong originally referred to the lengt
WITCHER [35]

the complete question is

While driving in an exotic foreign land you see a speed limit sign on a highway that reads 180,000 furlongs per fortnight. How many miles per hour is this? (One furlong is 1/8 mile, and a fortnight is 14 days. A furlong originally referred to the length of a plowed furrow.)

Step 1

<u>convert (furlongs per fortnight) to (miles per fortnight)</u>

180,000 furlongs per fortnight=180,000*(1/8)=22,500 miles per fortnight

Step 2

<u>convert miles per fortnight to miles per hour</u>

1 day=24 hour

14 day=24*14=336 hours

22,500 miles per fortnight=22,500/336=66.96 mph

therefore

<u>the answer is</u>

66.96 mph

7 0
4 years ago
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