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Mazyrski [523]
3 years ago
15

HELLPPPPPPP NO LINKSSS

Mathematics
1 answer:
REY [17]3 years ago
3 0

Answer:

(-3, 18) ; (-1, 6)

Step-by-step explanation:

y = x^2-2x + 3

y = -6x

-6x = x^2 - 2x + 3

x^2 + 4x + 3 = 0

(x+3)(x+1) = 0

x = -3

x = -1

Solution 1

x= -1

y = 6

Solution 2

x= -3

y = 18

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Prove that C(50,3) + C(50,4) = C(51,4)
valkas [14]

By definition of the binomial coefficient,

C(n,k) = \dfrac{n!}{k!(n-k)!}

so we have

C(50,3) + C(50,4) = \dfrac{50!}{3!47!} + \dfrac{50!}{4!46!} \\\\ = \dfrac{50!}{3!46!} \left(\dfrac1{47} + \dfrac14\right) \\\\ = \dfrac{50!}{3!46!} \times \dfrac{51}{188} \\\\ = \dfrac{51!}{3!46!} \times \dfrac1{4\times47} \\\\ = \dfrac{51!}{4!47!} \\\\ = \dfrac{51!}{4!(51-4)!} = C(51,4)

as required.

5 0
2 years ago
Which table shows values for the function y=2(1/2)^x
Talja [164]
<span>y=2(1/2)^x
</span>
x = 0; <span>y=2(1/2)^0 = 2(1) = 2
x = 1; </span><span>y=2(1/2)^1 = 2(1/2) = 1

answer is the last one.</span>
6 0
3 years ago
A hotel patron starts at the fifth floor and goes up seven floors to meet a friend. How many levels, and in which direction, mus
Sonbull [250]

Answer:

they must go 12 floors downwards because parking A has to be on the last floor

7 0
3 years ago
How many feet are in 100meters
77julia77 [94]

Answer: 328 feet, 1 inch

Step-by-step explanation:

3.281 feet makes 1 meter

To solve the question, Multiply the value by 3.281:

100 meters = 100 x 3.281 feets

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I hope this helps.

5 0
3 years ago
10. The sum of two numbers is 6 less than twice the first number. Their difference is 10 less than four times the second number.
Ilya [14]

Answer:

10 and 4.

Step-by-step explanation:

Let x be the first number.

Let y be the second number.

x + y = 2x - 6

x - y = 4y - 10

x = 4y - 10 + y

x = 5y - 10

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6y - 10 = 10y - 20 - 6

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6y - 10y = -26 + 10

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y = 4

x - (4) = 4(4) - 10

x - 4 = 16 - 10

x - 4 = 6

x = 6 + 4

x = 10

3 0
3 years ago
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