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andreyandreev [35.5K]
2 years ago
6

Which sentence explains the correct first step in the solution of this equation?

Mathematics
1 answer:
siniylev [52]2 years ago
3 0

Answer:

<h3>B. Apply the distributive property to get 4x-12=9</h3>

\boxed{\sf{x=\dfrac{21}{4}=5.25 }}

Step-by-step explanation:

Isolate the term of x from one side of the equation.

Use the distributive property.

<u>Distributive property:</u>

\Longrightarrow: \sf{A(B+C)=AB+AC}

<h3>4(x-3)=9</h3>

<u>Expand the form multiply.</u>

4*x=4x

4*3=12

<u>Rewrite the problem down.</u>

4x-12=9

<u>Add by 12 from both sides.</u>

4x-12+12=9+12

<u>Solve.</u>

<u />

<u>Add the numbers from left to right.</u>

9+12=21

4x=21

Divide by 4 from both sides.

4x/4=21/4

<u>Solve.</u>

<u>Divide the numbers from left to right.</u>

x=21/4

21/4=5.25

<u>x=21/4=5.25</u>

  • <u>Therefore, the final answer is x=21/4=5.25.</u>

I hope this helps you! Let me know if my answer is wrong or not.

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Find the median of the following numbers: 195, 230, 200, 226​
BlackZzzverrR [31]

Answer: 213

Step-by-step explanation: The median is the middle number

in the data set when the data set is written from least to greatest.

So let's start with writing ur data set from least to greatest.

So we have 195, 200, 226, 230.

Notice that there are two middle numbers.

If there are two middle numbers in the data set,

we find the median by taking their average.

In other words, we add the two middle numbers and divide by two.

So we have 200 + 226/2 or 426/2 which is 213.

3 0
3 years ago
The length of a rectangular flower garden is 9 feet and it’s width is 5 feet how many feet of fencing will be needed
Tju [1.3M]
Use the simple perimeter formula.
P = 2L + 2W
P = 2(9) + 2(5)
P = 19 + 10
P = 29ft

Therefore 29ft of fencing will be needed.
8 0
3 years ago
) Final averages are typically normally distributed with a mean of 72 and a standard deviation of 12.5. Your professor states th
Bad White [126]

Answer:

65.45

Step-by-step explanation:

Zscore = (x - mean) / standard deviation

x = score

Percentage below C :

D = 18% ; F = 12%

Sum = 30%

Obtain the Zscore for the proportion below D

P(Z < 0.30) = -0.524

Hence, Zscore = -0.524

Put Zscore = -0.524 in the equation :

-0.524 = (x - 72) / 12.5

-0.524 * 12.5 = x - 72

-6.55 = x - 72

-6.55 + 72 = x

x = 65.45

To receive a grade of C or better, score must be atleast 65.45

6 0
2 years ago
The following are the ages (years) of 5 people in a room:
Nat2105 [25]

Answer:

I think its 26 I would not swear it though

7 0
2 years ago
Urgent please help..
storchak [24]
The answer is 51.3

Explanation:
You’re finding angle Y, so write the SOH CAH TOA. the two sides your are given are the adjacent side to Y and the opposite side so you use tangent. You then get the equation tanY=10/8 Since you’re finding an angle you use inverse tangent so you get y=tan^-1(10/8) and then put that into the calculator!
8 0
3 years ago
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