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Masja [62]
3 years ago
8

If ln(x^2-x-1)=0 , then x= ?

Mathematics
1 answer:
Umnica [9.8K]3 years ago
3 0

Answer:

  x = -1 or 2

Step-by-step explanation:

Taking the antilog, you have the quadratic ...

  x^2 -x -1 = 1

  x^2 -x -2 = 0 . . . . subtract 1

  (x -2)(x +1) = 0 . . . factor

The values of x that make these factors zero are the solutions to the equation.

  x = 2  or  x = -1

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What is the sum of 8.4*10^8 and 4.2*10^7 written in scientific notation?
anyanavicka [17]
(8.4*10^8) + (4.2*10^7)

= 882,000,000
= 8.82*10^8

Hope it helped :)
5 0
3 years ago
Y-5=1/16(x-3)^2 i dont understand how to solve this
VLD [36.1K]

Answer:

Step-by-step explanation:

Add 5 to both sides of the equation.

y=1/16⋅(x−3)2+5

Simplify each term.

y=(x−3)^2/16+5

Use the vertex form, y=a(x−h)2+k, to determine the values of a, h, and k. a=1/16 h =3 k=5

Since the value of a is positive, the parabola opens up.

Opens Up

Find the vertex (h,k).(3,5)

Find p, the distance from the vertex to the focus.

4

Find the focus.

(3,9)

Find the axis of symmetry by finding the line that passes through the vertex and the focus.

x=3

3 0
4 years ago
A set consecutive integers sums to 54. Which integers are they
hram777 [196]

Answer:

The numbers 12, 13, 14, and 15.

Step-by-step explanation:

First, set up the equation as follows: x + (x + 1) + (x + 2) + (x + 3) = ??

Plug in the number you're searching for on the right-hand side of the equation: x + (x + 1) + (x + 2) + (x + 3) = 54.

Now, add like numbers and variables together, to get a sum of 4x + 6 = 54.

The next step to finding 'x' is to subtract the 6 on both sides, leaving you with 4x = 48.

Divide that out, and you get x = 12. Plug that number in the equation above, and you should get 12 + (13) + (14) + (15) = 54.

7 0
3 years ago
Draw a line on the graph to show the proportional relationship. Then find the cost for tickets
Inessa [10]

Answer:

We can not do that here.

Step-by-step explanation:


4 0
3 years ago
Is h=8 a solution to the inequality h−2>6 ?
jeyben [28]

Answer:

No

Step-by-step explanation:

Because h-2=8-2=6 and we can’t right 6>6?

6 0
3 years ago
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