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Ray Of Light [21]
3 years ago
7

Can anyone explain and give answer please?

Mathematics
1 answer:
Ghella [55]3 years ago
3 0

Answer:

slope = - \frac{1}{19}

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 19x + 57 ← is in slope- intercept form

with slope m = 19

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{19} ← slope of line w

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What are the solutions of the equation x4+3x2+2=0? use u substitution to solve
sweet [91]

Answer: x = ± i , x = ±√2i are solution .

Step-by-step explanation:

Given : x^{4} +3x^{2} +2=0, use u substitution to solve.

To find : what are the solutions of the equation .

Solution : We have given that x^{4} +3x^{2} +2=0.

Let consider x^{2} = u .

Substitute u =  x^{2} in given equation .

u^{2} + 3u +2=0.

On factoring

u^{2} + 2u+1u +2=0.

Taking common

u( u+2) +1 (u+2) = 0.

On grouping

(u+1) (u+2) =0

Now, u+1 = 0 ⇒ u = -1.

         u+2 = 0 ⇒ u = -2.

In term of x, plugging x^{2} = u.

x^{2} = -1   ;  x^{2} = -2.

taking square root both side

x = ± i

x = ±√2i.

Therefore, x = ± i , x = ±√2i are solution .

8 0
4 years ago
Please help me out it'd be apprieciated
ryzh [129]

Answer:

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Step-by-step explanation:

I got it right on the test

6 0
2 years ago
A piece of string is 325 325 centimeters long. You need the string to be 114 1 1 4 meters long. How many centimeters should you
DochEvi [55]
211211 you have to cut off
8 0
3 years ago
Use the Pythagorean theorem to find the lengths of the sides of the right triangle.
Gelneren [198K]

9514 1404 393

Answer:

  in the order (5m, 3m, 2m+2), ...

  • 5, 3, 4
  • (2+√34)/3, (2+√34)/5, (34+2√34)/15 ≈ (2.6103, 1.5662, 3.0441)

Step-by-step explanation:

There are two possible solutions:

<u>5m is the hypotenuse</u>

  (5m)² = (3m)² +(2m+2)²

  25m² = 9m² +4m² +8m +4

  3m² -2m -1 = 0 . . . . . . . . . . . write in standard form, divide by 4

  (m -1)(3m +1) = 0 . . . . . . . . factor

The positive solution for m is the value that makes m-1=0. It is m=1.

The side lengths are ...

  5m = 5 . . . hypotenuse

  3m = 3

  2m+2 = 4

__

<u>2m+2 is the hypotenuse</u>

  (2m+2)² = (5m)² +(3m)²

  15m² -4m -2 = 0 . . . . . . . write in standard form, divide by 2

Then the solutions using the quadratic formula are ...

  m = (-(-4) ± √((-4)² -4(15)(-2)))/(2(15)) = (4 ± √136)/30 = (2±√34)/15

The positive solution for m is ...

  m = (2+√34)/15 ≈ 0.522063

Then the side lengths of the triangle are ...

  (2m +2) = (34 +2√34)/15 ≈ 3.0441 . . . hypotenuse

  5m = (2 +√34)/3 ≈ 2.6103

  3m = (2 +√34)/5 ≈ 1.5662

5 0
3 years ago
1. A triangular swimming pool is an isosceles triangle in shape. The two
Nady [450]

Answer:

Side a = 35ft

Side b = 35ft

Side c = 20ft

Step-by-step explanation:

The formula for the perimeter of a triangle = Side a + Side b + Side c

In an isosceles triangle, 2 sides are equal to each other.

So, Side a = Side b

In the question, we are told that:

The two equal sides are each 5 ft less than twice the length of the third side.

Hence,

a = 2c - 5

b = 2c - 5

P = 90ft

P = a + b + c

90 = 2c - 5 + 2c - 5 + c

Collect like terms

90 = 5c - 10

90 + 10 = 5c

100 = 5c

c = 100/5

c = 20

The length of the third side = 20ft

a = 2c - 5

= 2 × 20 - 5

= 40 - 5

= 35 ft

b =2c - 5

= 2 × 20 - 5

= 40 - 5

= 35 ft

Therefore,

Side a = 35ft

Side b = 35ft

Side c = 20ft

3 0
3 years ago
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