tatyanachambliss tatyanachambliss
  • 03-05-2017
  • Mathematics
contestada

Seventy-five times an integer, minus 36, equals 21 times the square of the integer. Which equation could be used to solve for the unknown integer?

Respuesta :

irspow
irspow irspow
  • 03-05-2017
75n-36=21n^2  rearrange so we have an equation equal to zero...

21n^2-75n+36=0  divide whole equation by 3

7n^2-25n+12=0  now factor...

7n^2-21n-4n+12=0  

7n(n-3)-4(n-3)=0

(7n-4)(n-3)=0

Since this is an integer 4/7 is extraneous.

The integer value is 3


Answer Link
BunniesAreAwesome102 BunniesAreAwesome102
  • 02-11-2019

Answer:

The answer would be 21x2 − 75x + 36 = 0

Step-by-step explanation:

21x2 − 75x + 36

75x − 36 = 21x2

21x2 + 75x − 36 = 0

3(x + 4)(7x − 3) = 0

x = −4 or x = 3/7

Thus, the unknown negative integer is −4.

Answer Link

Otras preguntas

Pentane, C5H12, will react as shown below: ____C5H12(l) + ____O2 --- ______CO2 +_______ H2O H20(g) 1. Balance the equation above by putting coefficients into ea
the process that removes metabolic waste products from an organism is known as
An oak tree that is 220 years old produced acorns at two different rates. Until it reached maturity, it produced an average of 900 acorns a year. However, once
The sum of two numbers is 104 and one exceed the other by 10. What are the numbers?
Give an example of oxidation reaction which can be a nuisance
What are the steps to solve this?
How do you put 0.8918 as a fraction
A Coast Guard ship patrols an area of 125 square miles. The area the ship patrols is a square. About how long is each side of the square? Round your answer to t
How do you put 0.8918 as a fraction
How do you derive the drift velocity equation (I = nAve)?