$\left(\dfrac{1}{x}+x\right)^2=25\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\\left(\dfrac{1}{x}\right)^2+2(x\!\!\!\!\diagup)\left(\dfrac{1}{x\!\!\!\!\diagup}\right)+x^2=25\\\\\dfrac{1}{x^2}+2+x^2=25\qquad\text{subtract 2 from both sides}\\\\\dfrac{1}{x^2}+x^2=23$

5 0

3 years ago

Write an equation for the following problem

Novosadov [1.4K]

Answer:

I believe I know the answer! Please do tell me If I am wrong but math was never my strong sute so tell me If I’m wrong please!

Step-by-step explanation:

8n-15=27 or

(8xn)-15=27

Bonus: n= 5.25 or 5 1/4

(I think)

4 0

3 years ago

this morning, jose's car had 16.01 gallons of fuel. now, 1.5 gallons are left. how much fuel did jose use ?

Gekata [30.6K]

Answer:

Jose used 14.51 gallons of fuel

8 0

3 years ago

Can anyone help me find the value please?

AURORKA [14]

Answer:

the answer is x=15 cm

Step-by-step explanation:

here the above given figure is a rectangle ABCD with diagonals AC and BD measuring AC= (x+10)cm and BD=(3x-20) cm

Now,

AC=BD

or, 3x-20 = x+10 [ diagonals of a rectangle are equal]

or, 2x = 30

or, x= 15 cm

I HOPE IT WILL HELP YOU!!!

5 0

3 years ago