1. HOMEWORK: Formulas Worksheet
Sec 4: Formulas
Learning Target: Students will use a given formula to find a missing quantity in real-world and mathematical situations.

2. ACT Practice
The formula for converting Celsius to Fahrenheit is 𝐹= 9 5 𝐶+32. What is the degrees in Celsius if the temperature is 82° Fahrenheit to the nearest degree? A. 27 B. 28 C. 63 D. 1 E. 90
Answer: B

3. Ex 1: Practice with Formulas
Solve for the missing variable.
Area of a Circle: 𝐴= 𝜋 𝑟 2
Given: Area = 16𝜋
Pythagorean Theorem: 𝑎 2 + 𝑏 2 = 𝑐 2
Given:
Distance Formula: 𝑑= 𝑥 1 − 𝑥 𝑦 1 − 𝑦 2 2
Given: (2, 5) and (-1, 4) 15 12

4. Ex 2: Word Problems!
Find S using the formula 𝑆= 𝑎(1− 𝑟 𝑛 ) 1−𝑟 if a = -2, r = 2 and n = 3.
A C E. 7
B D. -2
2. 𝐴= 2𝑔𝑟 𝑔+𝑟 . What is the value of g when r = 1 and A = 4?
-2 C E
2 D

5. Ex 3: Trickery!
The formula ℎ=150𝑡 −16 𝑡 2 gives the height h in feet of an object t seconds after it is shot upward from Earth’s surface with an initial velocity of 150 feet per second. What will the height of the object be after 3 seconds?

6. HOMEWORK
Formulas Worksheet