Plz help Add the justifications (reasons) to the following proof and identify the error: GIVEN

9-15=-6
9-15=4-10
9-15+25/4=4-10+25/4
(3-5/2)^2=(2-5/2)^2
3-5/2=2-5/2
3=2

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°.

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?