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3 years ago

6(3c-5d+6) please help on this problem

Mathematics

1 answer:

Tom [10]3 years ago

5 0

I believe that the answer is 24cd. 3c - 5d = -2 + 6 = 4 x 6 = 24cd

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PLEASE HELP THIS IS A LINEAR EQUATIONS AND INEQUALITIES!!

AlekseyPX

A because there is no cubes or squared sign

4 0

3 years ago

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If 3 sisters receive $180 and split it so that the middle sister gets twice as much as the youngest sister and the oldest sister

timurjin [86]

Answer:

30$

Step-by-step explanation:

1st sister is 3x

2nd sister 2x

3th is x

3x+2x+x=180

6x=180

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8 0

3 years ago

Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. Th

denpristay [2]

Answer:

(1) Correct option is B.

(2) Correct option is C.

Step-by-step explanation:

The information provided is:

$n_{1}=200,\ \bar x_{1}=22.7,\ s_{1} = 4.5\\n_{2}=200,\ \bar x_{2}=19.7,\ s_{2} = 4.3$

The (1 - <em>α</em>)% confidence interval for the difference between two mean is:

$CI=\bar x_{1}-\bar x_{2}\pm t_{\alpha/2, (n_{1}+n_[2}-2}\sqrt{\frac{s_{1}^{2}}{n_{1}}+\frac{s_{2}^{2}}{n_{2}} }$

The critical value of <em>t</em> is:

$\alpha /2=0.05/2=0.025$

degrees of freedom $=n_{1}+n_{2}-2=200+200-2=398$

$t_{\alpha/2, n_{1}+n_{2}-2}=t_{0.025, 398}=1.96$

Compute the 95% confidence interval for the difference between two mean as follows:

$CI=22.7-19.7\pm 1.96\sqrt{\frac{4.5^{2}}{200}+\frac{4.3^{2}}{200} }\\=3\pm0.8624\\=(2.1376, 3.8624)\\\approx(2.14, 3.86)$

Thus, the 95% confidence interval, (2.14, 3.86) implies that the true mean difference value is contained in this interval with probability 0.95.

Correct option is B.

The null value of the difference between means is 0.

As the value 0 is not in the interval this implies that there is a difference between the two means, concluding that priming does have an effect on scores.

Correct option is C.

4 0

3 years ago

Which of the following is the value of a when the function f(x) = 3xl is written in the standard form of an absolute value

Feliz [49]

Answer:

D. 3

Step-by-step explanation:

For g(x) = |x|, we seem to have ...

f(x) = 3|x| = 3g(x) = a·g(x)

The value of 'a' is 3.

3 0

3 years ago

Plz helpppp I don’t GET THIS

Liono4ka [1.6K]

First you have to find 1/3 of the marbles. That means in the twelve marvels she has, there are three even groups. Divide twelve by three and you get four. So if each group is four, it is simple from here on out. If she started out with twelve and she lost 1/3 of them(4) it would be 12-4. You know this because lost is another for for subtract. 12-4=8. She has 8 marbles left.

6 0

3 years ago

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