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lilavasa [31]
3 years ago
12

Which of the following represents "four times the square of a number is thirty-six"? 4x 2 = 36 (4x) 2 = 36 4 2x = 36

Mathematics
1 answer:
KatRina [158]3 years ago
6 0

Answer:

4x^{2} =36

Step-by-step explanation:

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Given: ⅓ (18x + 27) = 81 Prove: x = 12
sasho [114]

Answer:

Firstly, rewrite the equation:

⅓ (18 + 27) = 81

Substitute x for the given number of it's supposed equivalent.

In this case x = 12.

⅓ (18(12) + 27) = 81

Solve using PEMDAS and simplify what is in the parenthesis first. Then, multiply.

(18 x 12) + 27 = 243

Now, solving using PEMDAS, multiply the total of what you got that was originally in the parenthesis by ⅓ .

⅓ (243) = 81

When you multiple these number they are equivalent to 81.

81 = 81

Since the equation given, when substituted x for 12, is equivalent to 81, this proves that substituting x for 12 makes this equation true.

4 0
3 years ago
US average math SAT scores follow a normal distribution with a mean of 505 and a standard deviation of 112. A sample of 64 enter
Hitman42 [59]

Answer:

The claim that the scores of UT students are less than the US average is wrong

Step-by-step explanation:

Given : Sample size = 64

           Standard deviation = 112

           Mean = 505

           Average score = 477

To Find : Test the claim that the scores of UT students are less than the US average at the 0.05 level of significance.

Solution:

Sample size = 64

n > 30

So we will use z test

H_0:\mu \geq 477\\H_a:\mu < 477

Formula : z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

z=\frac{505-477}{\frac{112}{\sqrt{64}}}

z=2

Refer the z table for p value

p value = 0.9772

α=0.05

p value > α

So, we accept the null hypothesis

Hence The claim that the scores of UT students are less than the US average is wrong

3 0
3 years ago
Factor Completely:<br> x²+x+8
Igoryamba

Answer:

Does Not Factor

Step-by-step explanation:

No way to factor this.

7 0
3 years ago
What is the standard form of (2+3i)(4-7i)/(1-I)
AlladinOne [14]
I believe in standard form this would be 31/2 + 27i/2
8 0
3 years ago
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The graph shows the cost per day of electricity over a seven-day period.
Darina [25.2K]
A. Negative. You’re welcome
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3 years ago
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