Answer:
The simplest way to teach middle school math scale drawings is to use real pictures to relate to each other to explain the concept. For example, scaling a red ball of 1" to a ball of 2" and so on. This will show how the ball increases by size by adding 1" each time.
The statements that must be true are c,e,f, but these are the statements that I think are correct
Answer:

Step-by-step explanation:
Given;
(a) y = tan (7t)
let u = 7t
y = tan(u)
du/dt = 7
dy/du = sec²(u)

(b)

let u = 4 - v²
du/dv = -2v
let v = 4 + v²
dv/du = 2v

Answer:
204/100 = 51/25= 2 1/25 that is the answer