Identify the addition property. 1. 78 + 0 + 52 = 78 + 52
2. 44 + 99 = 99 + 44
3. (67 + 34) + 67 = (34 + 67) + 67
4. (70 + 81) + 2 = 70 + (81 + 2)

I need help with identifying the addition property for each of the four questions.

1010: 3030

is it i think

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)