Answer:
D
Step-by-step explanation:
Quadratic has a general form of:
The quadratic given here is:
Matching it with the general form, we can see that:
a = 1 [coefficient of x^2]
b = 3
c = 1
Now, if we look at the formula for axis of symmetry, we can easily solve this out. The axis of symmetry is given by:
Axis of Symmetry is
We know a = 1 and b = 3, so we have:
Hence,
D is the correct answer.
Answer:
34 students walk home after school.
Step-by-step explanation:
85 · 0.40 = 34
w = 3(2a + b) - 4
First, add 4 to both sides:
w (+4) = 3(2a + b) - 4 (+4)
w + 4 = 3(2a + b)
Next, divide 3 from both sides:
(w + 4)/3 = (3(2a + b))/3
(w + 4)/3 = 2a + b
Next, subtract b from both sides:
((w + 4)/3) - b = 2a + b (-b)
(w + 4)/3 - b = 2a
Finally, divide 2 from both sides:
((w + 4)/3 - b)/2 = (2a)/2
a = (((w + 4)/3) - b)/2
a = (((w + 4)/3) - b)/2 is your answer.
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I’m pretty sure it’s A but I would just work it out to make sure
Answer:
The population of a statistical survey is chose at random, so it's not believed to be biased.