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Mariulka [41]
3 years ago
12

Helpppppppppppppppppppp

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
3 0
The quadratic formula is 
x= \dfrac{-b\pm \sqrt{b^2-4ac} }{2a}.

For the equation 4x^2-3x+9=2x+1, we must first convert it into standard form ax^2+bx+c=0. We see it is 4x^2-5x+8=0. From this, our coefficients are a=4, b=-5 and c=8. 

We plug these coefficients into the quadratic formula.

x= \dfrac{-(-5)\pm\sqrt{(-5)^2-4(4)(8)} }{2(4)} \\ \\ \\ \\ x = \dfrac{5\pm\sqrt{-103}}{8} \\ \\ \\ \\ x = \dfrac{5\pm\ i\sqrt{103}}{8}

The answer is C.
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Find the slope of the line.
cricket20 [7]
Your slope would be -1/4x. If you look at the y-intercept on your graph, which is -2, you would start to count up one box and over 4 boxes to the left. We call this rise/run. So knowing what the slope is now, your entire equation would be            y= -1/4x - 2. (Also, if the line is going up towards the left it is a negative slope, if it's to the right it is positive.) I hope this helps love! :) 
7 0
3 years ago
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7/5=x/3 solve proportion
-BARSIC- [3]
Cross-multiply: 7 * 3 = 5 * x Divide each side by 5 : X = 7 * 3 / 5 = 4.2
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Assuming that a soap bubble is a perfect sphere, what is the diameter of a bubble containing 1,000 cm3 of air? Round to the near
Minchanka [31]

Answer:

17.85 cm

Step-by-step explanation:

1) Area of a sphere formula: A=4\pi r^{2}

2) Plug in A: 1000 = 4\pi r^{2}

3) Simplify: 1000 = 12.56r^{2}

4) Divide Each Side By 12.56: 79.61783439 = r^{2}

5) Take the Square Root of 79.61783439 to Solve for r: 8.922882628 = r

6) Double r to get the diameter: 8.922882628*2= 17.84576486

7) Round to the Nearest Tenth: 17.85 cm

8 0
3 years ago
How do i solve this kind of problem
Advocard [28]

Answer:

y=x-2

Step-by-step explanation:

to get -2 to -4 you would have to add -2

if we follow the pattern of subtracting 2 then you would see that -2 is b sense we are subtracting.

The m value doesn't have to change so we would leave the x how it is

The goal for this question is to find the pattern the numbers share though out the table.

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How do i answer this?
Vedmedyk [2.9K]
Somesomeone answer this please !!!
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