1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kramer
3 years ago
11

(x - 5) 2 = 81

Mathematics
2 answers:
Bond [772]3 years ago
5 0

(x-5)^2=81\to x-5=\pm\sqrt{81}\ \ \ |+5\\\\x=5\pm\sqrt{81}

Answer: 5 ± √(81)

svetlana [45]3 years ago
5 0

Answer:

Option 2nd is correct

5 \pm \sqrt{81}

Step-by-step explanation:

Given the equation:

(x-5)^2 = 81

Taking square root both sides we have;

\sqrt{(x-5)^2}= \pm \sqrt{2}

Using the exponent rule:

\sqrt[n]{x^n}=x

then;

x-5 = \pm \sqrt{81}

Add 5 to both sides we have;

x-5+5= 5 \pm \sqrt{81}

Simplify:

x = 5 \pm \sqrt{81}

Therefore, the following expressions represents the solutions to the given equation is, 5 \pm \sqrt{81}

You might be interested in
Which function is the inverse of f(x)= 3x+5 over 7
Pani-rosa [81]

f(x) = (3x+5)/7

Step 1:

we write f(x) as y

y=(3x+5)/7

Step 2:

switch y by x and x by y

x=(3y+5)/7

Step 3:

solve for y,

x=(3y+5)/7

multiply both sides by 7

7x=3y+5

subtract 5 from left side

3y=7x-5

divide both sides by 3

y= (7x-5)/3

f⁻¹ (x) =(7x-5)/3

8 0
3 years ago
The length of a rectangle is 5/6 inches and the width of the rectangle is 2/15 inches. What is the area of the rectangle (write
Snowcat [4.5K]
1/9


Mark brainliest please


Hope this helps you
3 0
3 years ago
The numbers 5 and -5 are opposites.explain why 5 and -5 have the same absolute value
Citrus2011 [14]

Answer:

I think because the absolute value is always a positive number.

Step-by-step explanation:

3 0
2 years ago
Im not sure how to solve this please help
Effectus [21]
Look at the corresponding angle to 82, which is to the left of line b

It also measures 82 according to "corresponding angle theorem"


Then
angle x is equal to it as they are vertical pair of angle

so that, the measure of x equals 82 degree

I hope that helps
5 0
3 years ago
I NEED HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Nina [5.8K]
I believe the answer is the 64 ounce container that is $3.20. the unit price of it was 0.05 while the other one was 0.055
7 0
3 years ago
Read 2 more answers
Other questions:
  • Karen is 6 yrs older than her sister Michelle and Michelle is two years younger than their brother David If the sum of their age
    14·1 answer
  • It takes Ms Eberline 3/4 of an hour to drive to the store and 2/3 of an hour to drive to her son’s school. If ms ember line driv
    14·2 answers
  • What should NOT be considered when calculating the monthly cost of owning a car?
    10·1 answer
  • Can anyone help? I’m confused:(
    14·2 answers
  • A student on the track team runs 45 minutes each day as a part of her training. She
    6·1 answer
  • 2ft 3in = how many inches​
    5·1 answer
  • What is the area of the triangle shown?
    9·2 answers
  • select all the sets that are the three side lengths of right triangles A.8,7,15 B.4, 10, √84 C. √8, 11, √129 D. √1, 2, √3
    15·1 answer
  • You invest $20,000 in two accounts paying 12% and 11% annual interest, respectively. How much was invested in each account if, a
    5·1 answer
  • Suzi tiene $20 dólares en una cuenta de ahorros. El tipo de intereses es del 10% anual. Cuanto ganara en un año
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!