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3 years ago

4 - 7/x = 5 + 6/x help me guys

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

8 0

Answer:

x = -13

Step-by-step explanation:

or, (4x-7)/x = (5x+6)/x

or, (4x-7) = (5x +6)

[the x gets cancelled when it comes to opposite side]

or, 4x-5x = 6+7

or, -x = 13

or, x = -13

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Dilate point a in relation to the origin by a dilation factor of 5.?

IRINA_888 [86]

Answer:

origin dilation if 5. is 5

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2 years ago

5. Find the discriminant of 15x2 = 4x – 1 and describe

diamong [38]

Answer:

a) The discriminant of the equation = - 44

b)The nature of the roots will be imaginary.

c) $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

Step-by-step explanation:

Here, the given expression is $15x^{2} = 4x -1$

or, $15x^{2} - 4x + 1 = 0$

Now the discriminant (D) of a quadratic equation $ax^{2} +b x + c = 0$

D = $b^{2} - 4ac = (-4)^{2} - 4(15) (1) = 16 - (60) = -44$

Hence, the discriminant of the equation = - 44

As D< 0, so the roots will be imaginary.

Now,by quadratic formula : $x = \frac{-b \pm \sqrt{b^{2} - 4ac} }{2a}$

So, here $x = \frac{-(-4) \pm \sqrt{D} }{2a} = \frac{4 \pm \sqrt{(-44 )} }{30}$

So, either $x = \frac{4 + \sqrt{(-44 )} }{30} or, x = \frac{4 - \sqrt{(-44 )} }{30}$

or, $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

8 0

3 years ago

F(x) = 9x - x2 + 3x<br> F(1) =

mojhsa [17]

Answer:

f(1) = 10

Step-by-step explanation:

Here you can just replace any x with 1.

f(1) = 9(1) - (1)2 + 3(1)

4 0

3 years ago

2/15<br> ÷<br> 1/30<br> brainliest to the person who gets it correct and fast

muminat

Answer:

Step-by-step explanation:

we know that 2/15 : 1/30 = 2/15 * 30 = 60/15 = 4

3 0

2 years ago

Read 2 more answers

a metal mast is stabilized with 3 guy wires. Find the slope of one of the guy wires if d = 100 ft and h= 70ft

Alekssandra [29.7K]

Answer:

The slope of one of the guy wires is m=0.7

Step-by-step explanation:

Divide the vertical distance of the guy wire by the horizontal distance of the guy wire to find the slope of one of the guy wire.

We have

d = 100ft ----- horizontal distance

h = 70ft ------- vertical distance

Then,

m = h/d

Put the values in the given formula:

m = 70/100

m = 0.7

Thus the slope of one of the guy wires is m=0.7

6 0

3 years ago

4 - 7/x = 5 + 6/x help me guys ​

4 - 7/x = 5 + 6/x help me guys