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2 years ago

Which of the following shows the polynomial below written in descending order?

Mathematics

1 answer:

Juli2301 [7.4K]2 years ago

4 0

Answer:

Step-by-step explanation:

The values must decrease
x∧12≥3x∧7≥4x³≥9x

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Point slope line equation of the line through (8,-8) and (9,8)

Gnom [1K]

Answer:

y+8=16(x-8)

Step-by-step explanation:

y-y1=m(x-x1) is the formula

Just substitute from the first pair then you should get the answer.

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2 years ago

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3 years ago

Mandy wants to know the most popular kind of book at school Describe how Mandy could choose a sample

Colt1911 [192]

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3 years ago

Find the sum of a finite geometric sequence from n = 1 to n = 7, using the expression −4(6)n − 1.

Verizon [17]

Answer:

Step-by-step explanation:

The formula of a sum of terms of a gometric sequence:

$S_n=a_1\cdot\dfrac{1-r^n}{1-r}$

a₁ - first term

r - common ratio

We have

$a_n=-4(6)^{n-1}$

Calculate a₁. Put n = 1:

$a_1=-4(6)^{1-1}=-4(6)^0=-4(1)=-4$

Calculate the common ratio:

$r=\dfrac{a_{n+1}}{a_n}\\\\a_{n+1}=-4(6)^{n+1-1}=-4(6)^n\\\\r=\dfrac{-4(6)^n}{-4(6)^{n-1}}=6^n:6^{n-1}\\\\\text{use}\ a^n:a^m=a^{n-m}\\\\r=6^{n-(n-1)}=6^{n-n+1}=6^1=6$

$\text{Substitute}\ a_1=-4,\ n=7,\ r=6:\\\\S_7=-4\cdot\dfrac{1-6^7}{1-6}=-4\cdot\dfrac{1-279936}{-5}=-4\cdot\dfrac{-279935}{-5}=(-4)(55987)\\\\S_7=-223948$

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3 years ago

What is the graph of the function f(x)=x2-9x+20/x-4

Kipish [7]

Y=((x-5)(x-4))/(x-4)

y=x-5

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2 years ago