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Alika [10]
3 years ago
9

Find twe positive even consecutive intecers such

Mathematics
2 answers:
exis [7]3 years ago
5 0

Answer:

4 and 6

Step-by-step explanation:

x = smaller integer

x+2 = larger integer

x² = 10 + (x + 2)

x² = x + 12

x² - x - 12 = 0

factors are:

(x-4)(x+3) = 0

x-4=0;  x = 4

x+3=0;  x = -3

Since the question states the numbers are even and positive we use only the 4 and the next consecutive even integer is 6

Marat540 [252]3 years ago
4 0

Answer:

The numbers are 4 and 6

Step-by-step explanation:

Let:

  • x - the smaller even consecutive integer  
  • x+2 - the larger even consecutive integer

we know that

x^{2} =(x+2)+10

solve for x

x^{2} -x-12=0

We can use the quadratic formula for quadratics in the form ax^{2} +bx+c=0

x= \frac{-b(+/-)\sqrt{b^{2} -4ac}}{2a}

to give us an answer of 4 and -3

Since the question states positive and even we use 4 and that gives us 6 as the other answer
4 and 6

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Answer:

Step-by-step explanation:

Given that,

y = x + 6 equation 1

3x - 3y = -18.  Equation 2

Substitute equation 1 into equation 2

3x-3(x+6) = -18

3x - 3x - 18 = -18

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Therefore, it has no solution. Check attachment for echelon matrix solution

B. y = -2x + 5 equation 1

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Since the equation is not balance, then, it has infinite numbers of solution.

C. y = -4x + 11.  Equation 1

6x + y = 11.   Equation 2

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y = 0 + 11 = 11

Then, this has a unique solution I.e. one solution.

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3 years ago
On a December day, the probability of snow is 0.30. The probability of a "cold" day is 0.50. The probability of snow and "cold"
Margarita [4]

Answer:

Yes, snow and cold weather are independent.

Step-by-step explanation:

We are given the following in the question:

C: Cold weather

S: Snow

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P(S\cap C) = 0.15

We have to check whether snow and cold whether are independent events.

If the events A and B are independent then,

p(A\cap B) = P(A)\times P(B)

Checking,

p(S\cap C) = P(S)\times P(C)\\0.15 = 0.30\times 0.50

Thus, the two events are independent.

For mutually exclusive events

P(A\cap B) = 0

Thus, the given events are not mutually exclusive.

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