1 A tree was 14 and 3/8 inches tall when it was first planted. Two years later, the tree was 21 and 1/8 inches tall. How much did the tree grow in the two years?

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Ineed with number 6 , explain how to get 1978