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irinina [24]
3 years ago
10

6x5+2÷9-4help me please

Mathematics
1 answer:
igomit [66]3 years ago
6 0
6x5+2÷9-4
30x+2/9-4
2/9-4
-34/9
30x-34/9
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[Quick Answer Needed] Which of the following shows the extraneous solution to the logarithmic equation?
Nitella [24]

Answer:

C

Step-by-step explanation:

Given the logarithmic equation

\log_4x+\log_4(x-3)=\log_4(-7x+21)

First, notice that

x>0\\ \\x-3>0\Rightarrow x>3\\ \\-7x+21>0\Rightarrow 7x

So, there is no possible solutions, all possible solutions will be extraneous.

Solve the equation:

\log_4x+\log_4(x-3)=\log_4x(x-3),

then

\log_4x(x-3)=\log_4(-7x+21)\\ \\x(x-3)=-7x+21\\ \\x^2-3x+7x-21=0\\ \\x^2+4x-21=0\\ \\D=4^2-4\cdot 1\cdot (-21)=16+84=100\\ \\x_{1,2}=\dfrac{-4\pm 10}{2}=-7,\ 3

Hence, x=3 and x=-7 are extraneous solutions

6 0
3 years ago
Could somebody please answer this?
jok3333 [9.3K]
Here are the resulting percentages:
LEAH = 3.5%
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ED = 1.8%
CHRIS = 4.2%
MARY = 2.5%

You arrive at this answer by dividing the bonus by the wages

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Chris had the greatest percentage of wages in his bonus
3 0
3 years ago
You are saving up money to buy a new ipad. You begin with $25, and are able to save $40 each month. Write an
yawa3891 [41]

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567

Step-by-step explanation:

4 0
3 years ago
Giving brainlist to whoever answers
AURORKA [14]

Answer:

false

Step-by-step explanation:

False

5(9)(3.2)

45*3.2=144

Hope this helps :)

6 0
3 years ago
A class trip was 234 miles away from the school. If the bus driver drove at a constant speed of 70 mph, about how long did the t
galina1969 [7]
C. <span>3 hours 34 minutes

Divide: 
234 ÷ 70 = 3.34

Your answer is C

♥ Hope I helped ♥</span>
7 0
3 years ago
Read 2 more answers
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