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
Lena [83]
3 years ago
7

If x+1/x=7,find x^2+1/x^2​

Mathematics
1 answer:
trapecia [35]3 years ago
3 0

Answer:

x²+1/x² = 51

Explanation:

Given x - 1/x = 7 ---(1)

We know the algebraic identity:

a²+b²-2ab = (a-b)²

Or

a²+b² = (a-b)²+2ab

Now,

x²+1/x²

= (x-1/x)²+2*x*(1/x)

= (x-1/x)²+2

:7²+2 [ from (1)] =

= 49+2

= 51

Therefore,

x²+1/x² = 51

You might be interested in
If line q has a slope of -3/8 what is the slope of any line perpendicular to q?
kompoz [17]

Answer:

new slope = 4/3

Step-by-step explanation:

-3/8 is perpendicular to the new slope

=> new slope = -8/3 * -1/2

= 8/6

= 4/3

please give me brainliest if it is helpful for you

7 0
3 years ago
Is (5,6) a solution to this system of equations: 14x + 13y = -8<br> 19x + 14y = 11
rusak2 [61]

Answer:

Step-by-step explanation:

hello : 14x + 13y = -8

           19x + 14y = 11

test : put   x=5 and y=6

14(5)+13(6)≠ -8

conclusion : (5 , 6) is not solution

4 0
3 years ago
Bradley has a goal to work 28 hours each week at the pizza shop. So far he has
k0ka [10]

Answer:

it's 14h

Step-by-step explanation:

The h stands for hours and he needs to work 14 more hours.

8 0
3 years ago
Read 2 more answers
A shopper buys 3 notebook for $5 each the percent of sales tax is 8% how much is the total sale
Vlad1618 [11]
All you have to do is 3×5=15
then 8÷8=1 so 16 dollars
6 0
3 years ago
The length of the ladder that will run from the ground to the door of the tree house is nine feet. The plan recommends that the
Gwar [14]

Answer:

13 Rungs

Step-by-step explanation:

According to the Question,

  • Given, The length of the ladder that will run from the ground to the door of the treehouse is 9 feet ( 9 × 12 = 108 inches).

The plan recommends that the rungs of the ladder be spaced at 8-inch intervals.

  • And, The first and last rung should be 6 inches from the respective ends.

Thus, the rungs Cover on 108 -(6+6) = 96 inches with 8-inch gaping between each rung.

  • Therefore, the Total Rungs on the treehouse ladders have (96/8)+1 ⇒ 13 Ladders.
7 0
3 years ago
Other questions:
  • What's the value of a?
    15·1 answer
  • Write a mathematical expression for the word phrase -5/6 and 6/5
    10·1 answer
  • PLEASE ANSWER ASAP! AN EXPLANATION IS A MUST REQUIREMENT IN ORDER TO RECEIVE 10 POINTS AND THE BRAINLIEST ANSWER! THANKS!!!
    13·1 answer
  • A multiple choice exam has ten questions. Each question has five possible answers, of which one is correct. Suppose that a stude
    7·1 answer
  • PLEASE HELP
    9·1 answer
  • Based on the following equation. what is the radius of this circle? <br> (x-3)+(y+2)^2=4
    15·1 answer
  • 9. Mr. Wilson wants to park his car in a parking garage. To find the cost,
    9·1 answer
  • How do i evaluate a piecewise function
    12·1 answer
  • If a total amount is $1.69 and 24 cookies were made, how much will per cookie cost?
    9·2 answers
  • In the following diagram lines m are n parallel the measures of AEB, BAE and CED are shown what is the measure of EBF
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!