Answer:
54 degrees
Step-by-step explanation:
4y-7=2y+11
2y=18
y=9
4(9)-7=25
2(9)+11=29
25+29=54
Driver B had a mean race time of 3.96 seconds and a standard deviation of 0.12 seconds.
Driver C had a mean race time of 3.99 seconds and a standard deviation of 0.19 seconds.
Answer: driver a
Step-by-step explanation: because the time was 4.01
b. 42x2 – 4x2
c. 42x2 – 2x2
d. 38x2
Correct Answer:First Option
Explanation:
There are two ways to find the actual roots:
a) Either solve the given quadratic equation to find the actual roots
b) Or substitute the value of Possible Rational Roots one by one to find out which satisfies the given equation.
Method a is more convenient and less time consuming, so I'll be solving the given equation by factorization to find its actual roots. To find the actual roots set the given equation equal to zero and solve for x as given below:
This means the actual roots of the given equation are 3 and -4. So first option gives the correct answer.