Answer:8/12=2/3
Step-by-step explanation:
Answer: The real answer is - ask 10 students wearing football jerseys each day for a week
Step-by-step explanation: Think about it, chances are that all students they ask that are wearing a football jersey are most likely to favor football. So if you only ask people with a football jersey on, you will not get an accurate answer to represent the entire high school. You should ask people randomly instead of targeting a specific group.
Answer:
D. 1.4*10^-1 seconds
Step-by-step explanation:
We know that distance = rate * time
We know the rate = 3.00 • 10^8 meters per second
and the distance =4.2*10^7 meters
distance = rate * time
4.2*10^7 meters = 3.00 • 10^8 meters per second * time
Divide each side by 3.00*10^8
4.2*10^7 /3*10^8 = 3.00 • 10^8/3*10^8 * time
4.2*10^7 /3*10^8 = * time
4.2/3 * 10^7/10^8 = time
When we divide exponents of the same base, we subtract the exponents keeping the base
1.4 * 10^(7-8) = time
1.4 * 10^-1 seconds = time
So before we can solve using the quadratic formula, we have to set the equation to zero. We can do that by adding 2 on both sides of the equation
Now we can use the quadratic formula, which is , with a=x^2 coefficient, b=x coefficient, and c=constant. We can form the equation as such:
Firstly, solve the exponents and the multiplications:
Next, do the addition within the radicals (these will be your exact solutions. but I'll solve for the decimal form as well.):
Next, solve for the rest on your calculator, and your answers will be (rounded to the thousandths) y = -0.463, 0.863