Answer:
7
Step-by-step explanation:
5 x 2 = 10
10 - 3 = 7
4
Let the number be n
2 times the number: 2n
3 less than 2n: 2n-3
2n - 3 = 5
2n = 8
n = 4
x = -3
The graph is symmetrical about the vertical line through its vertex:
-78
We subtract 1, then 3, then 5, then 7
Then subtract 9,11,13,15,17
-21 -11 = -33
-33 -13 = -46
-46 -15 = -61
-61 -17 = -78
3, 2, -1, -6, -13, -22, -33, -46, -61, -78
40
The teacher ordered 5 pizzas with 8 slices each which is 5*8=40