Answer:
3
Step-by-step explanation:
The net of a cube consists of 6 squares which when folded form a cube. To form the net of a cube 4 of the face must be in line with two faces not aligned. This will allow the cube to have 4 sides and a top and bottom. Choices 1, 2, and 4 all have fours faces aligned with two faces not aligned. Choice 3 does not. This does not form a cube.
If her second test was x and her third was x+1 (since it was 1 more than the second), we get 75+x+x+1=76+2x as our total test scores. Next, to get the average you add up the numbers and divide it by the amount of numbers you have. Since we have 3 tests and our sum is 76+2x, we divide it by 3 to get (76+2x)/3=average=82. Multiplying both sides by 3, we get 246=76+2x. Next, we subtract both sides by 76 to get 170=2x. Lastly, we divide both sides by 2 to get 85=x= the second test score. Her third test score is x+1=85+1=86
13
Step-by-step explanation:
2x-3 = 6
2x(-3+3) = (6+3)
2x = 9
(2x ÷ 2) = (9 ÷ 2)
x = 4.5
