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3 years ago

-2y+4x=14 solve for y:Show your work

Mathematics

2 answers:

netineya [11]3 years ago

6 0

I recommend you Photo Math App. Here’s the process

bija089 [108]3 years ago

3 0

subtract 4x from both sides

-2y=14-4x

divide each side by -2

y=2x+7

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Put the following equation of a line into slope-intercept form, simplifying all

anzhelika [568]

Answer:

y = x + 7

Step-by-step explanation:

3y - 3x = 21

3y/3 - 3x/3 = 21/3

y = x + 7

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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

PLEASE ASSIST me in this geometry problem!!

My name is Ann [436]

Answer:

Solution given:

B=12.56cm²

P=12.56cm

H=6cm

Surface area of cylinder=P*H+2B=100.48cm²

Volume=B*H=12.56*6=75.36cm³

7 0

3 years ago

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11z/16+7z/8=5/16 as a decimal

babunello [35]

11z/16+7z/8=5/16
(11z+14z)/16=5/16
25z=5
z=5/25=1/5

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3 years ago

4.) Which equations below have no solution? Select all that apply, and justify your response with work. a.) x - 9 = 2(x - 3) + 1

Sophie [7]

Answer: Equations (b) and (e) do not have solutions

Step-by-step explanation: b) The x cancels out (-10x + 35) = -10x + 318; 35 = 318???? NO. e) 3(x + 2) + 1 = x + 2(4 + x); 3x + 7 = 3x + 8. The x cancels out again.

The other s can be solved for x.

3 0

2 years ago

Read 2 more answers