Answer:
![(-\infty, \infty)](https://tex.z-dn.net/?f=%28-%5Cinfty%2C%20%5Cinfty%29)
Step-by-step explanation:
Every number, when you raised to the second power is positive, therefore that inequality would be all real numbers.
![(-\infty, \infty)](https://tex.z-dn.net/?f=%28-%5Cinfty%2C%20%5Cinfty%29)
B = 3h . . . . . . . .given by the problem statement
A = (1/2)bh . . . . formula for the area of a triangle
486 cm² = (1/2)*(3h)*h . . . substitute given information
(2/3)*486 cm² = h² . . . . . .multiply by 2/3
√324 cm = h . . . . . . . . . . . . . .take the square root
The height is 18 cm.
The base is 3*18 = 54 cm.
answer: positive
for example: -2 x -2 x -2 x-2
=4 x -2 x -2
=-8 x -2
=positive 16
the answer is two football players weigh less than 70 kilograms
Answer: He planted 670 acres of corn.
Step-by-step explanation:
Let x be the number of acres of corn and y be the number of acres wheat Farmer planted.
According to the given information, we have the following system of equations:
![x+y=1180--------------(1)\\\\ 270x+135y=249750-----------------(1)](https://tex.z-dn.net/?f=x%2By%3D1180--------------%281%29%5C%5C%5C%5C%20270x%2B135y%3D249750-----------------%281%29)
Divide equation (2) by 135 , we get
![2x+y=1850---------------(3)](https://tex.z-dn.net/?f=2x%2By%3D1850---------------%283%29)
Subtract eqn (1) from (3), we get
![x=670](https://tex.z-dn.net/?f=x%3D670)
Put value of x in (1), we get
![670+y=1180\\\\ y=1180-670=510](https://tex.z-dn.net/?f=670%2By%3D1180%5C%5C%5C%5C%20y%3D1180-670%3D510)
Hence, he planted 670 acres of corn.