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Romashka [77]
3 years ago
9

suppose that y is varied inversly proportional to x, and that y=0.4 when x=2.5. find k. then find the value of y when x=4

Mathematics
1 answer:
fiasKO [112]3 years ago
4 0

XD oof loopppppppoooooooooool

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Michele correctly solved a quadratic equation using the quadratic formula as shown below.
Fofino [41]

Answer:

The original equation must have been:

7x^{2} -5x-2=0

Step-by-step explanation:

A quadratic equation is in the form of :

ax^{2} +bx+c=0

And it is solved in the form of :

x=\frac{-b+\sqrt{b^{-4ac} } }{2a} and x=\frac{-b-\sqrt{b^{-4ac} } }{2a}

Now the given equation is :

x=\frac{-(-5)+-\sqrt{(-5)^{2} -4(7)(-2)} }{2(7)}

We can see that here;

a = 7

b = -5

c = -2

So, the original equation must have been:

7x^{2} -5x-2=0

5 0
3 years ago
Ken had the following problem on a quiz: Two sides of a triangle have lengths of 8 feet and 11 feet. If the triangle’s perimeter
svetoff [14.1K]

Answer:

C) Ken added 19 to both sides of the equation rather than subtracting 19.

Step-by-step explanation:

I Just Took The Test On Edge

3 0
3 years ago
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A point in the figure is selected at random. Find the probability that the point will be in the part that is NOT shaded.
creativ13 [48]

Answer:

About 20%

Step-by-step explanation:

The probability of a point on the un-shaded region will be given by;

Area of the shaded region/total area

Considering that the circles are of the same size, then the length of the square is 2d

Area of the square = 4d²

Area of the shaded = (4d² -4π(d/2)²

                                = 4d² -πd², but π = 22/7

                                = 6/7d²

Probability = (6/7d² ÷ 4d²) × 100%

                  = (6/28 d²) × 100%

                  = 21.42 %

Therefore; the answer is about 20%

3 0
2 years ago
What property is 5x1/5=1
alisha [4.7K]

Answer:

Multiplicative Identity Property

Step-by-step explanation:

8 0
3 years ago
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Find tan B. AB=17,BC=15 AC= 8
Aneli [31]

Answer:

a is the ans;8/15

Step-by-step explanation:

we have tanb = p/ b

so,by taking reference angle b we get,

p=8 and b= 15.

therefore; tanb=8/15

5 0
3 years ago
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