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3 years ago

I've done this assignment four times and still have had no luck. Help please.

1 answer:

8 0

Okay. :D First, I'll help you understand this concept.http://images.flatworldknowledge.com/redden/redden-fig04_x032.jpg The credits to this image go to Flat World Knowledge. As you can see, there is one bolded line for the inequality and one dotted line. First and foremost, these lines represent the symbols of the inequalities involved. A dotted line will demonstrate a greater than or less than inequality. Meanwhile, a bolded line will show a greater than or equal to or a less than or equal to inequality. Now, let's get to the next conceptual idea.
You might be wondering where the lines come from. Well, the lines on the graph (of the inequalities) are basically like lines in slope-intercept form. For instance, take away the inequality symbol in an equality, like y > x. You then replace it with an equal sign, such that you get y=x. Of course, we know that this tweaked version isn't true, but this is a way to help familiarize yourself with drawing the inequality on the graph. Remember to draw the inequality like you would if the inequality were an equation.
Now, we can get on to the shading of linear inequalities. After drawing the line and marking the graph properly, you have to shade your linear inequalities. All you should do is draw solid lines that connect to your inequalities' lines, but the tricky part is shading or drawing these lines in the right direction. If there's the inequality y< 3x-2, you have to shade downwards of that line. If you have a "greater than" or "greater than or equal to" symbol, shade above the line. If you have a "less than" or "less than or equal to" symbol, shade below the line. Anyways, the another way to remember this is to shade to the right of the line if the line is a generally more vertical than horizontal for > or > or equal to symbols. Shade to the left for < or < or equal to symbols. If the line is more horizontal, shade upwards for > or > or equal to symbols. Also, shade downwards for < or < or equal to symbols. I hope this information was easy to grasp. Please let me know if you will need help for each question on its own after learning this, and I advise that you try out this first, as I think that it will help. :D

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Suppose the population of a certain city is 4735 thousand it is expected to decrease to 4049 thousand in 50 years. find the perc

Yuki888 [10]

Working out

$\frac{(4735 - 4049)}{4735} \times 100$
Percentage= Difference/Original value x 100

Difference =4735-4049=686

P=686/4735

=0.1448... × 100

=14.5

4 0

3 years ago

The value of an investment A (in dollars) after t years is given by the function A(t) = A0ekt. If it takes 10 years for an inves

Ludmilka [50]

Answer:

20 years.

Step-by-step explanation:

We have been given a formula $A(t)=A_0\cdot e^{kt}$ , which represents the value of an investment A (in dollars) after t years.

Substitute the given values:

$\$3,000=\$1,000\cdot e^{k*10}$

Let us solve for k.

$\frac{\$3,000}{\$1,000}=\frac{\$1,000\cdot e^{k*10}}{\$1,000}$

$3=e^{k*10}$

Take natural log of both sides:

$\text{ln}(3)=\text{ln}(e^{k*10})$

Using property $\text{ln}(a^b)=b\cdot \text{ln}(a)$ , we will get:

$\text{ln}(3)=10k\cdot\text{ln}(e)$

We know that $\text{ln}(e)=1$ , so

$\text{ln}(3)=10k\cdot 1$

$\text{ln}(3)=10k$

$\frac{\text{ln}(3)}{10}=\frac{10k}{10}$

$\frac{\text{ln}(3)}{10}=k$

$\$9,000=\$1,000\cdot e^{\frac{\text{ln}(3)}{10}*t}$

Dividing both sides by 1000, we will get:

$9=e^{\frac{\text{ln}(3)}{10}*t}$

Take natural log of both sides:

$\text{ln}(9)=\text{ln}(e^{\frac{\text{ln}(3)}{10}*t)$

$\text{ln}(9)=\frac{\text{ln}(3)}{10}*t\cdot\text{ln}(e)$

$\text{ln}(9)=\frac{\text{ln}(3)}{10}*t\cdot1$

$10*\text{ln}(9)=10*\frac{\text{ln}(3)}{10}*t$

$10\text{ln}(9)=\text{ln}(3)*t$

$10\text{ln}(3^2)=\text{ln}(3)*t$

$2\cdot 10\text{ln}(3)=\text{ln}(3)*t$

$20\text{ln}(3)=\text{ln}(3)*t$

Divide both sides by $\text{ln}(3)$ :

$\frac{20\text{ln}(3)}{\text{ln}(3)}=\frac{\text{ln}(3)*t}{\text{ln}(3)}$

$20=t$

Therefore, it will take 20 years for the investment to be $9,000.

5 0

3 years ago

Please help!! Solve for x - geometry

iren2701 [21]

Check the picture below.

4 0

4 years ago

A new car has a sticker price of $25,550, while the invoice price paid on it was $19.990 What is the percent amount of markup?

kupik [55]

Answer:

21.7%

Step-by-step explanation:

(25,550-19,990) / 25,550 = 5,560/25,550 = 0.217612524462 or 21.7% increase

6 0

3 years ago

Read 2 more answers

In a certain card game, for every 4 blue cards, there are 3 yellow cards. There are a total of 84 blue and yellow cards in the g

Westkost [7]

The simplest way to think of this is a ratio. In the original 7 cards used for demonstration, 4 are blue. You can write it like this:

$\frac{4}{7}$

Since there are 84 total cards, and you need to find how many total blue cards there are, you can compare the total of the sample to the complete total, and then solve for an x value of total blue cards.

$\frac{4}{7}$ = $\frac{x}{84}$

You can solve using cross multiplication. 84*4=336. 7*x=336.

x=48

7 0

4 years ago