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3 years ago

7th grade math help me pleasee:)

Mathematics

1 answer:

seropon [69]3 years ago

3 0

Answer:

#2 a) 3*5 b) 5x c)7*3 d) 3y

#3 a) x+x+x+x b) y+y+y+y+y c) c+c

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Which linear inequality is represented by the graph?

aksik [14]

Answer:

B. y ≤ 1/2x + 3

Step-by-step explanation:

To write the equation of the inequality, use the linear equation form y = mx + b. The y-intercept is b and is where the line intersects the y-axis. Here b = 3. You can find the slope m by counting between points the vertical and horizontal distances. Here it is 1/2. Substitute m = 1/2 and b = 3.

y = 1/2x + 3

Since this is an inequality and a solid line has been used, you must use ≤ and ≥. To determine which is for this equation, test the point (0,0) in each.

y ≤ 1/2x + 3 y ≥ 1/2x + 3

0 ≤ 1/2(0) + 3 0 ≥ 1/2(0) + 3

0 ≤ 3 True 0 ≥ 3 False

Since (0,0) is a part of the set of solutions, the equation which is true is the correct equation.

5 0

4 years ago

Pythagorean stack how long is this side

Alika [10]

Pythagorean stack i believe its 23 on the side

6 0

3 years ago

52% of 1000 registered voters intend to vote for Steven Collins for mayor. Based on a 95% confidence interval, can we assume tha

Naya [18.7K]

Using the z-distribution, it is found that the correct option regarding the question in the problem is given by:

B. No, since the confidence interval includes values less than 50%, his opponent may get more votes.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

In this problem, the parameters are given as follows:

$\pi = 0.52, n = 1000$

Hence, the bounds are given by:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.52 - 1.96\sqrt{\frac{0.52(0.48)}{1000}} = 0.489$

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.52 + 1.96\sqrt{\frac{0.52(0.48)}{1000}} = 0.551$

The lower bound is below 0.5, hence option B is correct.

More can be learned about the z-distribution at brainly.com/question/25890103

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7 0

2 years ago

F(x)=-3x-5 and g(x) =4x-2 find (f-g)(x)

Triss [41]

<span>F(x)=-3x-5 and g(x) =4x-2 find (f-g)(x)

</span>(f-g)(x) = -3x-5 - (4x-2)
(f-g)(x) = -3x -5 -4x + 2
(f-g)(x) = -7x -3

hope that helps

3 0

3 years ago

Graph each equation 3x+5y=12

diamong [38]

The graph of the equation, 3x + 5y = 12, is the graph attached in the image below.

<h3>How to Graph a Linear Equation?</h3>

The slope (m) and the y-intercept (b) of a linear equation can easily be determined by writing a linear equation in slope-intercept form, y = mx + b.

The slope of the line is the rise/run, while the y-intercept tells us at what point on the y-axis the line intercepts.

Rewrite 3x + 5y = 12, in slope-intercept form:

5y = - 3x + 12

y = -3/5x + 12/5

The slope of the line of the equation is -3/5 while the y-intercept is 12/5.

Therefore, the graph of the equation, 3x + 5y = 12, is the graph attached in the image below.

Learn more about the graph of a linear equation on:

brainly.com/question/14323743

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5 0

2 years ago