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TEA [102]
3 years ago
5

D is the wrong answer please help :(

Mathematics
2 answers:
Stella [2.4K]3 years ago
8 0

This can be solved by Newton's binomial formula

Tk+1 = (n k) a∧(n-k) b∧k  k+1=7 => k=6, n=11 , a=-3x and b=-2y

T7= (11 6) (-3x)∧(11-6) (-2y)∧6 = (11*10*9*8*7)/(1*2*3*4*5) (-3x)∧5 (-2y)∧6

T7= 462 (-3x)∧5 (-2y)∧6

The correct answer is A.

Good luck!!!


Viktor [21]3 years ago
7 0

\displaystyle T_r=\binom{n}{r-1}x^{n-r+1}y^{r-1}\\\\\\T_7=\binom{11}{6}(-3x)^{11-7+1}(-2y)^{7-1}\\\\T_7=\dfrac{11!}{6!5!}(-3x)^5(-2y)^6\\\\T_7=\dfrac{7\cdot8\cdot9\cdot10\cdot11}{2\cdot3\cdot4\cdot5}(-3x)^5(-2y)^6\\\\T_7=462(-3x)^5(-2y)^6

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Jack took a test and got 13 out of 17 points. He took a make-up test and got 12 out of 15 points.
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Answer:

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3 0
3 years ago
There are 45 students in a class. The ratio of boys to girls is 2:3. How many boys are there in the class?
Lena [83]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
The coordinate plane below represents a city. Points A through F are schools in the city.
Usimov [2.4K]
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For parabolas drawn like that in the picture, the general form is (x - h)² = +4a(y-k), where the vertex is (h,k) and a is the distance from the vertex to the focus. From the picture, the vertex is at (0,3). Then, we use point D(-2,4) to determine a:

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Part C. For y < 7x − 4, ignore the equality symbol first and graph the line. Assign random values of x, then you get corresponding values of y. Plot them as shown in the second picture. The line is shown in red. Next, test the equation by choosing a random point. Let's choose the purple point at (4,3).

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5 0
3 years ago
If u help me with this question you are amazing ❤️❤️
madreJ [45]

Answer:

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Step-by-step explanation:

if this is useful please make me brainliest

7 0
3 years ago
The sum of two numbers is 52. One number is 3 times as large as the other. What are the numbers?
JulsSmile [24]
<span> Let x be the smaller number.
Then 3x is the larger number.
We also know that the smaller added to the larger is 52, or:
x + 3x = 52
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x = 13
Therefore the smaller is 13, the larger is 3(13)=39. </span>
3 0
3 years ago
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