This stem-and-leaf diagram shows the heights of some students in Year 8.
What is the range of their heights?

Give your answer in centimetres (cm).

Heights of Year 8 students
13 | 0
14 |2 3 3 4 5 5 7 9
15 |1 4 5 6 6 8
16 |2 3
Key
14|2 represents 142 cm

HELP

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions