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s2008m [1.1K]
3 years ago
9

Which shows the graph of the solution set of 2x + 3y ≤ 6?

Mathematics
2 answers:
AlexFokin [52]3 years ago
6 0

Answer:

option A

Step-by-step explanation:

2x + 3y ≤ 6

To graph the given inequality, we replace <= symbol by =

2x + 3y = 6

Solve for y, subtract 2x on both sides

3y= -2x+6

now divide both sides by 3

y=\frac{-2}{3}x+2

Now we make a table, assume some numberrs for x  and find out y

x        y= -2/3x + 2

-3        y= (-2/3)(-3)+2= 4

0          y=2

3           y=0

Use point (-3,4)  (0,2)  and (3,0) for graphing. Used solid line

Now shading, use test point (0,0)

2x + 3y ≤ 6

2(0) + 3(0)<=6

0<=6  that is true so we shade the part that contains (0,0)

The graph is attached below

irina [24]3 years ago
4 0
The dividing line will have to hit the points (0,2) and (3,0)
then you can test the point (0,0) which satisfies the inequality, so you will shade the side that has (0,0) on it, so it's the first picture.
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If f(1) = 160 and f(n + 1) = –2f(n), what is f(4)?
lions [1.4K]

Answer:

-1280

Step-by-step explanation:

There are 2 ways you could do this. You could just do the question until you come to the end of f(4). That is likely the simplest way to do it.

f(1) = 160

f(2) = - 2 * f(1)

f(2) = -2*160

f(2) = -320

f(3) = -2 * f(2)

f(3) = -2 * - 320

f(3) = 640

f(4) = - 2 * f(3)

f(4) = - 2 * 640

f(4) = - 1280

I don't know that you could do this explicitly with any real confidence.

5 0
2 years ago
Read 2 more answers
Rebecca collected data from a random sample of 1200 homeowners in her state asking whether or not they use electric heat. Based
larisa [96]

Hi,

The answer is c. The sample is biased.

This is because the sample is taken on a single state, an Rebecca reports a statistic about the nation. Her data contains information only of her state. If she lives in a very cold state, there is probably more homeowners using electric heat than in a hot state.

6 0
3 years ago
Last summers, students who worked earned an average of $80 a week with a standard deviation of $12. What percentage of students
Roman55 [17]

Answer:

  • 2.28%

Step-by-step explanation:

<u>Given:</u>

  • μ = 80
  • σ = 12
  • x = 104

<u>Find z-score:</u>

  • z = (x - μ)/σ
  • z = (104 - 80)/12 = 2

Percent value corresponding to 2 as per z-table is 0.9772. This is corresponding to 97.72%.

<u>Percentage of students earned more than $104:</u>

  • 100 - 97.72 = 2.28
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2 years ago
Select the correct answer.<br> What are the possible values of x in 6x2 + 432 = 0?
Stolb23 [73]

Answer:

D.

Step-by-step explanation:

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2 years ago
Please help I dont understand ​
Studentka2010 [4]

Step-by-step explanation:

When it says y varies directly with x it just means that y and x are proportional/equal to each other. The constant of variation and the constant of proportionality are the same thing just different way of saying it so they can confuse you and make your life miserable. Since y and x are proportional to each other and the constant of proportionalty is -5 to make an equation that represents a line you use the formula y=mx+b. That is the slope of the line. With that formula let's first plus in the x so we have y=m2+b. The formula for direct variation is y=kx as well that's good to know and it's good to memorize all these formulas. Math becaomes easier when you have the process down pat and you just need to plug numbers into different equations, expressions, and scenarios. Do m = [y1 - y2] / [x1 - x2] and you'll get the answer.

7 0
2 years ago
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