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Lorico [155]
3 years ago
8

How many solution does x^2=4x-5 have

Mathematics
1 answer:
masha68 [24]3 years ago
8 0
X^2-4x+5=0
D= b²-4ac=16-4*5*1=16-20=-4
so no real solutions, because D<0
 and it is going to be only 2 imaginary solutions
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Willa says the slope of the graph is - 3. What error did
Yuri [45]

Answer:B

Step-by-step explanation: “she counted the squares instead of using the scale” by looking at the graph the first coordinates are (4,24) and instead of doing that Willa counted the squares.

5 0
4 years ago
Can anyone answer this please?
brilliants [131]

Answer:

5

Step-by-step explanation:

just look at the graph

5 0
3 years ago
One group (A) contains 390 people. Three-fifths of the people in group A will be selected to win $100 fuel cards. There is anoth
svetoff [14.1K]

The ratio of nonwinners in group A to nonwinners in group B after the selections are made is 156 : 319.

<h3>What is the ratio?</h3>

Ratio expresses the relationship between two or more numbers. It shows the frequency of the number of times that one value is contained within other value(s).

Nonwinners in group A = (1 - 3/5) x 390 = 156

Winners in group B = (390 - 156) = 234

nonwinners in group B = 553 - 234 = 319

The ratio = 156 : 319

To learn more about ratios, please check: brainly.com/question/25927869

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5 0
3 years ago
1.Multiply and simplify if possible.
vivado [14]

Answer:

One sqrt(7)*x -49sqrt(x)

Two -30sqrt(2)a

Right: - 3 cuberoot(2a)

Step-by-step explanation:

Left Questions

One

sqrt(7)x ((sqrt(x) - 7sqrt(7) )                         Remove the Brackets

  • sqrt(7x) * sqrt(x) - sqrt(7x) * 7sqrt(7)
  • √(7*x)*sqrt(x) - 7*7*sqrt(x)                                          Combine
  • √7 (x) - 49x

This question has a a slight bit of ambiguity in it. Is the x outside the brackets underneath the root  sign or not? I have taken it as not. Leave a note if I am wrong. <em><u>Edit</u></em>: This question clears itself when you use the original statement. I think it is correctly represented now. When you use √ you have to use brackets to show what is under the root sign.

Two

You can take a lot of common factors out side the brackets.

The common factors are 3*sqrt(2)*a When you do that, you are left with

  • 3*sqrt(2)*a * ( 11 - 21)
  • 3*sqrt(2)*a * (-10)
  • The final answer is
  • -30sqrt(2)*a

Of course there are other, more direct ways of doing this.

Right Question.

The problem here is answering in such a way that you are showing work.

Let z = 3∛(2a)

The problem now becomes

z*(1 - 2)

- z

Now substitute back

-3∛(2a)      Answer

5 0
3 years ago
Someone please help mee (will give brainliest 20 points!!!)
Blizzard [7]

Step-by-step explanation:

the functional graph is the line.

a functional graph is always showing the direct relationship between a value on one coordinate axis with a value in the other coordinate axis

here it is between the price in dollars (as we can understand it : per unit) and the number of units sold.

clearly, the more units we sell, the cheaper we have to make the price per unit.

the question is how many units can be sold for a given price ($60).

so, I find the given price on the price axis (in this case the vertical axis), go then along that price all the way to the right until I hit the function line, and then go straight down to the unit axis and see what value I am hitting there : 80. which means 80,000 units.

so, I can sell 80,000 units for $60 per unit.

8 0
2 years ago
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