nikkiCloud nikkiCloud
  • 04-06-2019
  • Mathematics
contestada

6 more than 3 times what number squares is 81

Respuesta :

RussianGuy
RussianGuy RussianGuy
  • 04-06-2019
When you write that equation, you get 3x^2+6=81.

Solving for x:

Subtract by 6 on both sides of the equation to get 3x^2=75.

Then, divide by 3 on both sides of the equation to get x^2=25.

Finally, do the square root on both sides of the equation to get x=5.

The number is 5.
Answer Link

Otras preguntas

Enter the value of n for the equation. 3^5x3^n=3^8
Simplify (x + 2)(x2− 4x − 9). Ax3− 2x2− 17x − 18 Bx3− 6x2− x − 18 Cx3− 4x2− 3x − 18 D x3− 10x2− 9x − 18 I feel like it's C
Does anyone know what this answer is​
cydney.bulit a display stand out of two cubes. The large Cube is 8 inches on each side. The smaller cube is 4 inches on each side. She painted the entire outsid
How to model 4÷2/3??
Please read "Carnivorous Plans say 'cheese'" before completing these questions. It can be found in your weekly checkpoint module. This question has two parts. F
Heather has 509 in her savings account.She withdraws 20 per week for gas.Write an equation Heather can use to see how many weeks it will take her to have a bala
What is 8% of 101.49
what is a repeat remainder
what is 2 to the 0 power in expression form