Answer & Step-by-step explanation:
In this problem, we are given two functions.
<em>s(x) = 2x + 1</em>
<em>r(x) = -x² + 3x</em>
We are asked to find the difference between s(x) and r(x).
<em>(2x + 1) - (-x² + 3x)</em>
Distribute the negative to the second parentheses.
<em>2x + 1 + x² - 3x</em>
Combine like terms and put the equation in standard form. This means the exponents should be in descending order.
<em>x² - x + 1</em>
So, (s - r)(x) equals x² - x + 1
<em />
5(x − 4)^2
5(x - 4)(x - 4)
5(x^2 - 8x + 16)
5x^2 - 40x + 80
Did you follow?
Answer:
32.9
Step-by-step explanation:
Using proportions, it is found that 78 students would prefer long jump.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
Out of 300 students, 26% would prefer long jump, hence the amount is given by:
n = 0.26 x 300 = 78 students.
More can be learned about proportions at brainly.com/question/24372153
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