The answer would be 4 because your rounding to the whole. If your rounding to the tenth it would be 3.4
So x + y = 45, and 4x + 5y = 195. Get y by itself. Subtract x from both sides in the first equation to get y = 45 -x, and subtract 4x from the second equation to get 5y = 195 - 4x. Divide by 5 to both sides to get y = 39 - 4/5x. 39 - 4/5x = 45 - x. Add x to both sides to get 39 - 1/5x = 45. Subtract 39 from both sides to get -1/5x = 6. Divide by -1/5 to get x = -30, or 30. In the first equation, do 30 + y = 45. Subtract 30 from both sides to get y = 15. Check. 4(30) + 15(5) = 195, or 120 + 75 = 195.
Answer:
x = 30'
2x = 60'
3x = 90'
Step-by-step explanation:
2x + 3x + x = 180
6x = 180
6x ÷6 = 180 ÷ 6
x = 30'
therefore
2x = 60"
3x = 90'
hope this will helpful....
Answer:
circle: a sphere, cone, or a cylinder as 3d
