Answer:
D
Step-by-step explanation:
4x²= 32
x²= 32 ÷4 <em>(</em><em>÷</em><em>4</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>
x²= 8
x= ±√8 <em>(</em><em>square</em><em> </em><em>root</em><em> </em><em>bith</em><em> </em><em>sides</em><em>)</em>
☆ A '±' symbol has to be added whenever we introduce a square root as the square of any number, positive or negative, would result in a positive number.
Answer: The speed of red horse = 44 feet per second and the speed of black horse = 35.2 feet per second.
Step-by-step explanation:
Given: A red horse and a black horse raced on a 1-mile-long circular racetrack.
Time taken by red horse = 120 seconds
Time taken by black horse = 150 seconds
Speed = ![\dfrac{Distance}{Time}](https://tex.z-dn.net/?f=%5Cdfrac%7BDistance%7D%7BTime%7D)
So, speed of red horse =![\dfrac{1}{120}\text{ mile per second}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B120%7D%5Ctext%7B%20mile%20per%20second%7D)
Since 1 mile = 5280 feet
Speed of red horse = ![\dfrac{5280}{120} =44\text{ feet per second}](https://tex.z-dn.net/?f=%5Cdfrac%7B5280%7D%7B120%7D%20%3D44%5Ctext%7B%20feet%20per%20second%7D)
Similarly,
Speed of black horse = ![\dfrac{5280}{150} =35.2\text{ feet per second}](https://tex.z-dn.net/?f=%5Cdfrac%7B5280%7D%7B150%7D%20%3D35.2%5Ctext%7B%20feet%20per%20second%7D)
Hence, the speed of red horse = 44 feet per second and the speed of black horse = 35.2 feet per second.
Answer: A and D thanks for th 25 pts
Step-by-step explanation:
Answer:
f(42) = 12
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
Step-by-step explanation:
<u>Step 1: Define</u>
f(x) = x/3 - 2
f(42) is x = 42
<u>Step 2: Evaluate</u>
- Substitute in <em>x</em>: f(42) = 42/3 - 2
- Divide: f(42) = 14 - 2
- Subtract: f(42) = 12
Answer:
B) 24
Step-by-step explanation:
8x3=24