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creativ13 [48]
2 years ago
8

Help me with this please. .. . . . .

Mathematics
1 answer:
lisabon 2012 [21]2 years ago
4 0

Answer:

Se attached

Step-by-step explanation:

Solution is in the picture

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Solve the system, or show that it has no solution. (If there is no solution, enter NO SOLUTION. If there are an infinite number
liberstina [14]

Answer:

The system has an infinite set of solutions (x,y) = (x, \frac{x-5}{4})

Step-by-step explanation:

From the first equation:

20x - 80y = 100

20x = 100 + 80y

x = \frac{100 + 80y}{20}

x = 5 + 4y

Replacing on the second equation:

-14x + 56y = -70

-14(5 + 4y) + 56y = -70

-70 - 56y + 56y = -70

0 = 0

This means that the system has an infinite number of solutions, considering:

x = 5 + 4y

4y = x - 5

y = \frac{x - 5}{4}

The system has an infinite set of solutions (x,y) = (x, \frac{x-5}{4})

8 0
2 years ago
What is the circumference of the circle shown below?
pshichka [43]

Answer:

A. 25.12 meters

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4 0
3 years ago
Read 2 more answers
Express sin(3theta) in terms of sin (theta)
BigorU [14]
3∅ can be rewritten as (2∅+∅)
sin(3∅) = sin(2∅ + ∅<span>)
Opening brackets on the right hand side;
 = sin2</span>∅ cos ∅ + cos2∅sin<span>∅
</span><span>This simplifies to;
 = 2sin</span>∅cos^2∅ + sin∅ (1- 2sin^2∅<span>)
 = sin</span>∅ (2cos^2∅ + 1 - 2sin^2∅<span>)
 = sin</span>∅ (2(1 - sin^2∅) +1-2sin^2∅<span>)
 = 3sin</span>∅ - 4sin^3<span>∅</span>
7 0
2 years ago
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Find each function value f(-4) if f(x) = -5x - 3
Firlakuza [10]

Answer: f(-4) = 17

Step-by-step explanation: Substitute (-4) for x.

  • f(-4) = -5(-4) - 3
  • f(-4) = 20 - 3
  • f(-4) = 17
4 0
2 years ago
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A number cube is rolled 350 times and these are the results: 60 ones, 65 twos, 54 threes, 63 fours, 62 fives, and 46 sixes. What
BlackZzzverrR [31]
The experimental probability can be represented as a fraction of the number of times a five was not the result over the total number of times the cube was rolled.

The answer would be 288/350 or 144/175.
7 0
3 years ago
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