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FromTheMoon [43]
2 years ago
5

I’m confused on this

Mathematics
2 answers:
dexar [7]2 years ago
4 0

\huge\boxed{x=25}

The mistake is in Step 1. The solver should have also squared 9 when squaring the other side of the equation.

<h3>Correctly solving</h3>

\begin{aligned}\sqrt{3x+6}&=9\\(\sqrt{3x+6})^2&=9^2\\3x+6&=81\\3x+6-6&=81-6\\3x&=75\\\frac{3x}{3}&=\frac{75}{3}\\x&=25\end{aligned}

goldfiish [28.3K]2 years ago
3 0

Answer:

x = 25

Step-by-step explanation:

The mistake here is the squaring. When you square one side, you have to do the same on the other side:

\sqrt{3x+6} = 9

(\sqrt{3x+6}) ^{2} = 9^{2}

3x + 6 = 81

3x = 75

x = 25

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20 POINTS PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
pantera1 [17]

Answer:

39/37 and 6/5

Step-by-step explanation:

To start, let's assume that 9-8x is positive (we will do this to get rid of the absolute value, but then check later). We get 9(9 - 8x) = 2x + 3, or 81 - 72x = 2x + 3, so 74x = 78 and x = 39/37. If we assume 9-8x is negative, the |9-8x| will turn into 8x-9, so we get 9(8x - 9) = 2x + 3, or 72x - 81 = 2x + 3 , so 70x = 84 and x = 6/5. If we plug the values back in, 9-8(39/37) needs to be positive, which works, and 9-8(6/5) needs to be negative, and this works, so the answers are 39/37 and 6/5.

7 0
4 years ago
Find the probability of a least one birthday match among a group of 44 people.
Cerrena [4.2K]

Answer:

0.1137= 11.37%

Step-by-step explanation:

Assuming there are 365 days in one year and every people have 1 birthday, then the chance for two people to have the same birthday is 1/365 and the chance they are not is 364/365. We are asked the chance for at least one match among 44 people. The opposite of the condition is that we have 0 matches and easier to calculate. The calculation will be:

P(X>=1)= ~P(X=0) = 1

P(X>=1)=- P(X=0)

P(X>=1)=1 - (364/365)^44

P(X>=1)=1- 0.8862

P(X>=1)=11.37%

3 0
3 years ago
Find the circumference and area of a circle with a diameter of 22 inches. Leave your answers in terms of pi.
Gnesinka [82]
The answer for this will be letter d. C = 22π and A = 121π. This is computed using the formula of C= Dπ which is C = (22)π. On the other hand, the area of this circle is computed by using the formula A = <span>πr^2. This is computed as follows:
A = </span><span>πr^2
A = </span><span>π (22/2)^2
A = </span><span>π (11)^2
</span>A = 121<span>π</span><span>

</span>
4 0
3 years ago
Consider the exponential function g(x) = 1,296 x .
AleksandrR [38]
1296(-1.75)= -2268;
 1296(-1)= -1296;
 1296(-0.25)= -324;
 1296(0)=0;
 1296(0.25)=324;
 1296(0.5)=648;
1296(0.75)=972);
 1296(1)=1296
4 0
3 years ago
ATHLETICS of 107 athletes surveyed about what sport they play, some play basketball. of those that play basketball , 48 play bas
aliina [53]

the number of athletes who do not play basketball is 26.

Step-by-step explanation:

<u>DATA:</u>

Athletes surveyed = 107 athletes

<u>Athletes who play basketball</u>

Athletes who play baseball = 48 athletes

Athletes who don't play baseball = 33 athletes

Athletes who play basketball = athletes who play baseball + athletes who don't play baseball

Athletes who play basketball = 48 + 33

Athletes who play basketball = 81

<u>EQUATION:</u>

Total athletes = Athletes who play basketball + Athletes who don't play basketball

107 = 81 + x

x = 107 - 81

x = 26

Therefore,  the number of athletes who do not play basketball is 26.

Keyword: equations

Learn more about equations at

  • brainly.com/question/9738996
  • brainly.com/question/8955867

#LearnwithBrainly

5 0
3 years ago
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