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iren2701 [21]
3 years ago
9

Solve for x: 6x + 1/4 (4x + 3) > 12 Ox> 10 7 Ox> 2 ox= 10 X = 2

Mathematics
1 answer:
daser333 [38]3 years ago
7 0

Given:

The inequality is:

6x+\dfrac{1}{4}(4x+3)>12

To find:

The values for x.

Solution:

We have,

6x+\dfrac{1}{4}(4x+3)>12

Using distributive property, we get

6x+\dfrac{1}{4}(4x)+\dfrac{1}{4}(3)>12

6x+x+\dfrac{3}{4}>12

7x>12-\dfrac{3}{4}

7x>\dfrac{48-3}{4}

On further simplification, we get

7x>\dfrac{45}{4}

Divide both sides by 7.

x>\dfrac{45}{7\times 4}

x>\dfrac{45}{28}

Therefore, the required solution is x>\dfrac{45}{28}.

Note: All options are incorrect.

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In two or more complete sentences, describe the transformation(s) that take place on the parent function, f(x)=log(x), to achiev
matrenka [14]
Transforming f(x) = log(x) to f(x) = log (2x) gives the effect of squashing the graph horizontally (by halving the x-coordinate)

Then from f(x) = log(2x) to f(x) = log (-2x) is reflecting on the y-axis

Then from log(-2x) to log(-2x-4) is to translate by 4 units to the right

Finally from log(-2x-4) to log(-2x-4)+5 is translating the graph up by 5 units


5 0
4 years ago
AC method, Factoring step by step I don't know how to do .
katrin2010 [14]

Answer:

(5a+4c)(2a-b)

Explanation:

Given the expression:

10a^2-5ab+8ac-4bc

First, group the expression into two:

=(10a^2-5ab)+(8ac-4bc)

• In the first group, 5a is a common factor.

,

• In the second group, 4c is a common factor.

Factor these out by dividing each term by the GCF of each group.

\begin{gathered} =5a(\frac{10a^2}{5a}-\frac{5ab}{5a})+4c(\frac{8ac}{4c}-\frac{4bc}{4c}) \\  \\ =5a(2a-b)+4c(2a-b) \end{gathered}

Since the terms inside the brackets are the same, combine:

=(5a+4c)(2a-b)

CHECK

To check if your result is correct in cases like these, expand as follows:

\begin{gathered} (5a+4c)(2a-b)=5a(2a-b)+4c(2a-b) \\ =10a^2-5ab+8ac-4bc \end{gathered}

Our result is the same as the original question, hence, the work is correct.

8 0
1 year ago
Solve this system of equations.<br><br> 3x+4y=4<br> -x-3y=7
JulsSmile [24]

Answer:

x = 8, y = -5

Step-by-step explanation:

Multiplying the 2nd equation by 3, we get -3x-9y = 21. Then eliminating with the first equation we get -5y = 25. y = -5. Substituting this into the original equation, we get x = 8.

4 0
3 years ago
Read 2 more answers
Multiply: (v2x^3 + V12x) (2_10x^5 + V6x^2)
Effectus [21]

Step-by-step explanation:

STEP

1

:

Equation at the end of step 1

((22•3x2) - 10x) + 5 = 0

STEP

2

:

Trying to factor by splitting the middle term

2.1 Factoring 12x2-10x+5

The first term is, 12x2 its coefficient is 12 .

The middle term is, -10x its coefficient is -10 .

The last term, "the constant", is +5

Step-1 : Multiply the coefficient of the first term by the constant 12 • 5 = 60

Step-2 : Find two factors of 60 whose sum equals the coefficient of the middle term, which is -10 .

5 0
3 years ago
Question Help Assume that when adults with smartphones are randomly​ selected, 6464​% use them in meetings or classes. If 2020 a
Vitek1552 [10]

Answer:

16.78% probability that exactly 12 of them use their smartphones in meetings or classes.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they use their smartphone in meetings or classes, or they do not. The probability of a person using their phone in meetings or classes is independent of any other person. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

64​% use them in meetings or classes.

This means that p = 0.64

20 adult smartphone users are randomly​ selected

This means that n = 20

Probability that exactly 12 of them use their smartphones in meetings or classes.

This is P(X = 12).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 12) = C_{20,12}.(0.64)^{12}.(0.36)^{8} = 0.1678

16.78% probability that exactly 12 of them use their smartphones in meetings or classes.

5 0
3 years ago
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