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
kodGreya [7K]
2 years ago
11

If a+1/a = 5, find the value of a² +1/a²​

Mathematics
2 answers:
Orlov [11]2 years ago
6 0

a - 1/a =5

take squaring both side

(a - 1/a )^2 = (5)^2

a^2 +1/a^2 -2.a.1/a =25

a^2+1/a^2 -2 =25

a^2+1/a^2 =27 (answer)

docker41 [41]2 years ago
5 0

Answer:

a^2+\frac{1}{a^2}=23

Step-by-step explanation:

a+\frac{1}{a}=5\\squaring\\a^2+(\frac{1}{a})^2+2\times a \times \frac{1}{a}=5^2\\a^2+\frac{1}{a^2} +2=25\\a^2+\frac{1}{a^2}=25-2=23

You might be interested in
Plz help me. Plz calculate 4(x−2)−3
Alisiya [41]

Answer:

4x-11

Step-by-step explanation:

open parentheses: 4x-8-3

solve: 4x-11

7 0
3 years ago
Gretchen earns extra money mowing lawns on the weekend. She mows 3 lawns per hour and earns $12.00 per lawn. How much does Gretc
stepladder [879]

Gretchen will earn $48 from mowing in 4 hours

Data

  • Amount earned on each lawn = $12
  • Number of hours mowing = 4 hours

<h3>What is Rate</h3>

This is the measure of one unit against another unit. An example of this is speed which is the rate of distance covered to time.

In this case, she mows 1 lawn in each hour and earns $12 on each.

To calculate for 4 hours

4*12=$48

She earns $48 from mowing 4 lawns

learn more on rates here;

brainly.com/question/8728504

4 0
2 years ago
A manufacturer makes closed cubic containers from sheet metal. How many square centimeters of sheet metal will a 27,000 cm 3 con
dezoksy [38]

let's recall that a cube is just a rectangular prism with all equal sides, check picture below.

\bf \textit{volume of a cube}\\\\ V=s^3~~ \begin{cases} s=&length~of\\ &a~side\\ \cline{1-2} V=&27000 \end{cases}\implies 27000=s^3\implies \sqrt[3]{27000}=s\implies 30=s \\\\[-0.35em] ~\dotfill\\\\ \textit{surface area of a cube}\\\\ SA=6s~~\begin{cases} s=&length~of\\ &a~side\\ \cline{1-2} s=&30 \end{cases}\implies SA=6(30)\implies SA=180

6 0
3 years ago
Which of the following is a solution to the inequality below?
BaLLatris [955]
I did the math but I got -4 so maybe -14
6 0
2 years ago
Read 2 more answers
if grant drove his car for 417 miles on 15 gallons of gas. how many miles per gallon does grants car get?
lara [203]

Answer:

27.8 per mile.

Step-by-step explanation:

417 divided by 15 equals 27.8 miles per gallon

miles/ gallon

/ = per

so

417/ 15

27.8 gallons

3 0
2 years ago
Read 2 more answers
Other questions:
  • At the Barclays Center there are 850 seats. Tickets were sold for 816 of the seats. For what percentage of the seats were ticket
    14·2 answers
  • I need help on this question
    9·2 answers
  • John cut a paper square with a perimeter of 18 inches into two rectangles. The perimeter of one of the rectangles is 10 inches.
    12·1 answer
  • Find the difference quotient of f; that is, find f(x+h)-f(x) , h ≠ 0 for the following function
    12·1 answer
  • A $4 sales tax is charged for a $50 purchase. At this rate, what is the sales tax for a $1200 purchase?
    6·1 answer
  • Which line segment is congruent to BC?<br> GEOMETRY HELP PLS!!!
    9·2 answers
  • ILL GIVE BRAINLIEST IF YOU ANSWER THEM
    6·1 answer
  • Find the probability for one roll of a number cube.<br><br> P(number greater than or equal to 7)
    10·1 answer
  • Quick please I need this before I go
    10·2 answers
  • Can you help me please
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!