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Sloan [31]
3 years ago
9

How many solutions does the equation x^2-9x=-8 have?

Mathematics
1 answer:
Elza [17]3 years ago
8 0
X^2-9x=-8
x^2-9x+8=-8+8
x^2-9x+8=0
(x-8)(x-1)=0

x-8=0
x-8+8=0+8
x=8

x-1=0
x-1+1=0+1
x=1

There are 2 solutions, which are 1 and 8 
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((Picture) CONVERGENT AND DIVERGENT SERIES PLEASE HELP!!
Lina20 [59]

Answer:

A


Step-by-step explanation:

A series is said to be convergent if |r| < 1. Where r is the common ratio of the series.

If |r| ≥ 1 then the geometric series diverges.

12/5 + 48/25 + 192/125 + ....

r = 192/125 ÷ 48/25 = 4/5

r = 48/25 ÷ 12/5 = 4/5

In the series, r is less than 1. So the series is convergent.

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3 years ago
Will give BRAINLIEST!!
andrew11 [14]

Answer:

B

Step-by-step explanation:

6 0
3 years ago
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olya-2409 [2.1K]

Answer:

Nên sử dụng số răng lẻ cho đĩa xích dẫn động kết hợp với số lượng mắt xích chẵn để mài mòn đồng đều trên răng và trục lăn. Trong trường hợp này, một răng cụ thể của bánh xích không tiếp xúc với một mắt xích cụ thể của xích trong mỗi lần quay.

Step-by-step explanation:

Translated

It is preferable to use an odd number of teeth for the driving sprocket in combination with an even number of chain links for uniform wear and tear on the teeth and rollers. In this case, a particular tooth of the sprocket wheel does not come in contact with a particular link of the chain for every rotation.

3 0
2 years ago
Solve the boundary value problem <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bd%5E%7B2%7Dy%7D%7Bdx%5E%7B2%7D%7D%20%2B%204%20%5
Sonja [21]
Characteristic equation:

r^2+4r-5=(r+5)(r-1)=0\implies r=-5,r=1

\implies y_c=C_1e^{-5x}+C_2e^x

Given that y(0)=0 and y\left(\dfrac\pi2\right)=1, you have

\begin{cases}0=C_1+C_2\\1=C_1e^{-5\pi/2}+C_2e^{\pi/2}\end{cases}\implies C_1=\dfrac{e^{5\pi/2}}{1-e^{3\pi}},C_2=-\dfrac{e^{5\pi/2}}{1-e^{3\pi}}

so that the particular solution is

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6 0
2 years ago
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Stolb23 [73]

Answer:

x = -9

Step-by-step explanation:

the equation is 2^4x = 8^x - 3.

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since both have powers of 2

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2 years ago
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