Evaluate to earn 10 points and brainliest
1 answer:
You might be interested in
<u>ANSWER</u>
<u>EXPLANATION</u>
When a quadratic equation is in the vertex form,
the equation of axis of symmetry is simply
The given quadratic equation is
We can rewrite this as
We now compare to
We have
Therefore equation of axis of symmetry is:
Answer:
% of the students prefer biology.
Step-by-step explanation:
Let's read and write all the data from the question.
100 students are interviewed to see which of biology, chemistry and physics they prefer.
Therefore, we have three categories to classify the students :
A student that prefers biology
A student that prefers chemistry
And a student that prefers physics
52 of the students are girls. Therefore,
students are boys.
29 of the girls like biology best. In order to answer the question, we will only need the amount of boys that prefer biology and sum them to the amount of girls that like biology best.
24 of the boys prefer physics. Therefore,
is the sum of the boys that prefer chemistry and biology.
13 out of the 21 who prefer chemistry are girls. Therefore,
are boys that prefer chemistry.
If 24 is the sum of the boys that prefer chemistry and biology ⇒
are boys that prefer biology.
If we sum is the number of students that prefer biology.
If we want to calculate the percentage we need to divide the amount of students that prefer biology by the total of students interviewed and then multiply that number by 100 :
%
45 % of the students prefer biology.