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3 years ago

−4(5 − 3x) = 12x + 20

Mathematics

2 answers:

andrezito [222]3 years ago

8 0

−4(5 − 3x) = 12x + 20

Solve for x:

First use the Distributive property:

-20 + 12x = 12x +20

Add 20 to both sides:

12x =12x + 40

Now you can't get X by itself, because both sides of the equation have the same quantity of x ( they both have 12x).

This means there is no solution.

jasenka [17]3 years ago

5 0

Answer:

no solution

Step-by-step explanation:−4(5 − 3x) = 12x + 20

−20 + 12x = 12x + 20

−20 = 20 → Since the values are not equal, there is no solution.

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What is the characteristic of a Matrix Null:

Kryger [21]

The characteristic of a Null Matrix is :

A)All elements are = 0

C)First row = 0

D)First Column = 0

Step-by-step explanation:

Here we have , to tell which of the following are the characteristic of the null matrix :

Null Matrix : A null matrix is a matrix whose every element is zero ! for Example - $\left[\begin{array}{ccc}0&0&0\\0&0&0\\0&0&0\end{array}\right]$ is a 3×3 matrix , i.e. 3 rows & 3 columns .

A)All elements are = 0

Yes, All elements of a Null matrix are equal to 0 .

B)All elements are negative

No , not even a single matrix entry is negative .

C)First row = 0

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D)First Column = 0

Yes, First column is equal to zero!

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3 years ago

Name the place value to which each number was rounded 7.429 to 7.4

alexgriva [62]

Answer:

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Step-by-step explanation:

1/10=0.1 ==> one-tenth

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2 years ago

A data set has a normal distribution with a mean of 47 and a standard deviation of 4.6. Use this information to scale the horizo

gulaghasi [49]

Horizontal axis with 1, 2, and 3 standard deviations above the mean are 51.6, 56.2, 60.8

Horizontal axis with 1, 2, and 3 standard deviations below the mean are 42.4, 37.8, 33.2

Step-by-step explanation:

A data set has a normal distribution with a mean of 47 and a standard deviation of 4.6

Mean, M ⇒ 47
Standard deviation ⇒ 4.6

From this information, you have to scale the horizontal axis with the mean of this distribution and values at 1, 2, and 3 standard deviations above and below the mean.

Horizontal axis with 1, 2, and 3 standard deviations above the mean :

1 standard deviation above the mean ⇒ M + SD

⇒ 47 + 4.6 = 51.6

2 standard deviations above the mean ⇒ M + 2SD

⇒ 47 + (2 × 4.6) = 56.2

3 standard deviations above the mean ⇒ M + 3SD

⇒ 47 + (3 × 4.6) = 60.8

Horizontal axis with 1, 2, and 3 standard deviations below the mean :

1 standard deviation below the mean ⇒ M - SD

⇒ 47 - 4.6 = 42.4

2 standard deviations below the mean ⇒ M - 2SD

⇒ 47 - (2 × 4.6) = 37.8

3 standard deviations below the mean ⇒ M - 3SD

⇒ 47 - (3 × 4.6) = 33.2

8 0

4 years ago

Need help please can you give answer with working out i can not answer as it is quite gard

Elis [28]

Step-by-step explanation:

$\text{Given:}\\\\AB=3x-4\\AC=2x+12\\BC=7x-2\\AB:AC=1:2\Rightarrow(3x-4):(2x+12)=1:2\\\\\dfrac{3x-4}{2x+12}=\dfrac{1}{2}\qquad\text{cross multiply}\\\\(3x-4)(2)=(2x+12)(1)\qquad\text{use the distributive property}\\\\(3x)(2)+(-4)(2)=2x+12\\\\6x-8=2x+12\qquad\text{add 8 to both sides}\\\\6x-8+8=2x+12+8\\\\6x=2x+20\qquad\text{subtract}\ 2x\ \text{from both sides}\\\\6x-2x=2x-2x+20\\\\4x=20\qquad\text{divide both sides by 4}\\\\\dfrac{4x}{4}=\dfrac{20}{4}\\\\x=5$

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3 years ago

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Answer:

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Step-by-step explanation:

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