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Mandarinka [93]
3 years ago
5

The equation is __ ( type your answer in standard form)

Mathematics
2 answers:
Tanya [424]3 years ago
5 0

First, find the slope of the line between the two points using

     m = \dfrac{y_2-y_1}{x_2-x_1}

Then use one point to calculate the b for  y=mx+b.

Step 1: slope

   \begin{aligned}m&=\dfrac{7-4}{-4-2}\\[0.5em]&=\dfrac{3}{-6}\\[0.5em]&=-\dfrac{1}{2}\end{aligned}

Step 2: calculate b

Right now we have y=\frac{1}{2}x+b, so we'll plug in (2,4) for the x and y:

    \begin{aligned}\\4&=-\frac{1}{2}(2)+b\\[0.5em]4&=-1+b\\[0.5em]5&=b\end{aligned}

Now we build our slope-intercept equation: y=-\frac{1}{2}x+5

But, this isn't standard form.  We need to clear out the fraction and then move the x-term to the left.

Can you take it from there?

yan [13]3 years ago
4 0

Answer:

In standard form, the answer should be : 2y + x = 6.

Step-by-step explanation:

See attached image.

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1) Solve the following equation for x: 2x-5=7<br> A) 1 B) 6 () 24<br> D 4<br> 0 0 0 0
harina [27]

Answer:

x = 6

Step-by-step explanation:

Given

2x - 5 = 7 ( add 5 to both sides )

2x = 12 ( divide both sides by 2 )

x = 6

5 0
3 years ago
Read 2 more answers
Can someone help me on this?
Setler79 [48]

Answer:

⅜ or ⅗

Step-by-step explanation:

I say ⅜ because of how many variables you can take into account 3 different colors, and a 2 sided coin, lastly 3 different numbers. So in total that is 8 possible variables and the 3 being blue, heads, and landing on 1.

Now I say ⅗ because of this perspective on the variables. You have the 3 colors, and your two sided coin but thing here is that the 1 is basically another color so the question is technically asking for the probability of spinning blue, landing on heads and landing on red in a sense.

Go with your gut though between those 2

7 0
4 years ago
Sabiendo que cada persona unos 4 500 000 glóbulos rojos por milímetro cúbico y que su cantidad de sangre es de 5 litros A) Que l
love history [14]

Answer:

Part A) distance covered by the aligned red cells is: 180000 Km

Part B) 8000000 bacteria (8 million bacteria)

Step-by-step explanation:

Part A)

Let's first find the total number of red cells that the person has in the 5 liters, knowing that there are 4,500,000 of them in a cubic millimetre:

Since 1 liter contains 1,000,000 cubic millimetres, then, in 5 liters there must be 5 times that number of cubic millimetres. That is a total of 5,000,000 cubic millimetres.

Since in each cubic millimetre there are 4,500,000 red cells, then the number of red cells in the 5 liters must be the product of these two quantities:

4,500,000 x 5,000,000 = 22,500,000,000,000 red blood cells.

Now, to find the distance they will cover aligned one after the other, knowing that their average diameter is 0.008 mm is:

22,500,000,000,000 x 0.008 mm= 180000000000 mm

22.5\,\,10^{12} * 8\,\,10^{-3}=1.8\,\,10^{11} mm

In order to convert this distance into Km as requested, we use the fact that 1 mm = 0.000001 Km, or using exponents in base ten:

1 mm = 10^{-6}\,\,Km

Then, the distance covered in kilometers is:

1.8\,\,10^{11}\,*\,10^{-6} \,\,Km=1.8\,\,10^{5}\,\,Km=180000\,\,Km

Part B)

The vaccine contains a total of  10^8  bacteria per cm^3

In order to find how many bacteria we have in 80 mm^3 of the vaccine, we first need to convert 80 mm^3  into cm^3:  

80\,\, mm^3 = 0.08 \,\,cm^3

Then, if in one cm^3 there is 10^8  bacteria, in 0.08\,\,cm^3 there would be: 0.08\,*\,10^8 bacteria. That is: 8\,\,10^6 bacteria = 8000000 bacteria (eight million bacteria)

8 0
3 years ago
Problem 25 a freelance writer earns $20 for each blog post and $60 for each feature article. how many feature articles did the w
myrzilka [38]
The given are:
cost for each blog = $20
cost for each feature article = $60
blog = 10+2(number of articles sold)
total earnings = $700

where, 
a = article
b = blog

to solve,
60(a)+20(10+2a)=700
60a+200+40a=700
200+100a=700
100a=700-200
100a=500
a=500/100
a=5
The total feature articles produced last week was 5.

to check, 
a+b=700
60(5)+20[10+2(5)]=700
300+20(10+10)=700
300+200+200=700
700=700

Indeed, the number of articles produced last week was 5.
7 0
3 years ago
Help meeee plisss its for today!! ​
antoniya [11.8K]
I think the correct answer is -8x+4

explanation:
This would be considered a rise over run. So you see where the line hits the point on the y intercept (thats where the four came from) and you count down until you see where the point hits on the x intercept ( thats where the negative 8 came from) and you go over one because thats where the point was, so you can write -8/1 or you can just do -8x.
5 0
3 years ago
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