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Tanya [424]
3 years ago
6

Please help me answer this. I think that for the first one the answer is A, but I am not sure. There are two parts to the questi

on.

Mathematics
2 answers:
Ne4ueva [31]3 years ago
6 0
P=(5,4). Q=(7,3). R=(8,6) AND S=(4,1)

PQ = (7-5 , 3-4) =PQ=(2,-1)

RS =(4-8 , 1-6) =RS=(-4 , -5). 4.RS=(-16 , -20)

PQ+4RS = (-16-2 , -19) ; PQ = (-18 , -19)
Anika [276]3 years ago
4 0
Vector PQ=(7-5, 3-4)=(2, -1).  4RS=4 \cdot (4-8, 1-6) = 4 \cdot (-4, -5) = (-16, -20).  So the sum is (-14, -21).

For the second, the magnitude is the square root of the sum of the squares of the components.  This is equal to \sqrt{(-14)^2+(-21)^2} = \sqrt{637}=7\sqrt{13}.
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Hii i’ll give brainliest please help thanks :)
Juliette [100K]

Answer:

Step-by-step explanation:

The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest.

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2 years ago
What term is 1/1024 in the geometric sequence,-1,1/4,-1/6..?
Trava [24]

Answer:

\large\boxed{\text{sixth term is equal to}\ \dfrac{1}{1024}}

Step-by-step explanation:

The explicit formula for a geometric sequence:

a_n=a_1r^{n-1}

a_n - n-th term

a_1 - first term

r - common ratio

r=\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=...=\dfrac{a_n}{a_{n-1}}

We have

a_1=-1,\ a_2=\dfrac{1}{4},\ a_3=-\dfrac{1}{6},\ ...

The common ratio:

r=\dfrac{\frac{1}{4}}{-1}=-\dfrac{1}{4}\\\\r=\dfrac{-\frac{1}{6}}{\frac{1}{4}}=-\dfrac{1}{6}\cdot\dfrac{4}{1}=-\dfrac{2}{3}\neq-\dfrac{1}{4}

<h2>It's not a geometric sequence.</h2>

If a_3=-\dfrac{1}{16} then the common ratio is r=\dfrac{-\frac{1}{16}}{\frac{1}{4}}=-\dfrac{1}{16}\cdot\dfrac{4}{1}=-\dfrac{1}{4}

Put to the explicit formula:

a_n=-1\left(-\dfrac{1}{4}\right)^{n-1}

Put a_n=\dfrac{1}{1024} and solve for <em>n </em>:

-1\left(-\dfrac{1}{4}\right)^{n-1}=\dfrac{1}{1024}\qquad\text{use}\ a^n:a^m=a^{n-m}\\\\-\left(-\dfrac{1}{4}\right)^n:\left(-\dfrac{1}{4}\right)^1=\dfrac{1}{1024}\\\\-\left(-\dfrac{1}{4}\right)^n\cdot(-4)=\dfrac{1}{1024}\\\\(4)\left(-\dfrac{1}{4}\right)^n=\dfrac{1}{1024}\qquad\text{divide both sides by 4}\ \text{/multiply both sides by}\ \dfrac{1}{4}/\\\\\left(-\dfrac{1}{4}\right)^n=\dfrac{1}{4096}\\\\\dfrac{(-1)^n}{4^n}=\dfrac{1}{4^6}\qquad n\ \text{must be even number. Therefore}\ (-1)^n=1

\dfrac{1}{4^n}=\dfrac{1}{4^6}\iff n=6

5 0
3 years ago
Write a polynomial function of least degree that has real coefficients, the following zeros: 1,5,3+i and a leading coefficient o
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Answer:

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Please answer correctly !!!!!!!!!! Will mark brainliest !!!!!!!!!!!!
Drupady [299]

Answer:

6

Step-by-step explanation:

f(6) = -6   this is the value when the x value is 6

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4 * f(6) -6*g(5)

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5 0
3 years ago
Read 2 more answers
A public school in your city has 1710 girls among the 2970 students. What is the ratio of boys to girls in school
Minchanka [31]

Answer:

The simplest answer would just be 14:19

However the unsimplified answer is 1260:1710

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3 years ago
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