1st one on second row I think
Answer:
Unrounded, it would be 19.625, and rounded it would be 19.63
Step-by-step explanation:
Following the formula pi r^2, I came up with this answer. Hope this helps!
Answer:
Solve for x, y, and z. 1st Equation: 2x + 2y + 4z = 48. 2nd Equation: 2x + 9y + 7z = 105. 3rd Equation: x + 4y + z = 37. Subtract the 2nd Equation from the 1st Equation. This will eliminate the variable “x”.
Step-by-step explanation:
This is how i would do it divide 81 by 2 then take 21 of one side and add it to the other side
Unsure of what you mean by "reference number."
I do recognize that 11pi/9 is in quadrant III. I suspect that the so-called "reference number" is the acute angle between the end ray of 11pi/9 and pi, or, in more easily comparable numbers, between 9pi/9 and 11pi/9.
That difference is 2pi/9.
