What substitution should be used to rewrite 4x^4-21x^2+20=0 as a quadratic equation
1 answer:
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Options:
(A) . A football team lost 3 yards on one play. The team gained 7 yards on the next play.
(B ). A football team gained 3 yards on one play. The team lost 7 yards on the next play.
(C). A football team gained 3 yards on one play. The team gained 7 yards on the next play.
Answer:
(B ). A football team gained 3 yards on one play. The team lost 7 yards on the next play.
Step-by-step explanation:
Given
Required
Which situation does it represent?
First, we simplify the expression as follows:
Remove brackets
Express each term with their signs
<u>Analysing each term;</u>
In terms of the list of given options,
+3 means a gain of 3 yards
-7 means a loss of 7 yards
<em>Hence, B. is correct</em>
The variation equation is p = kr^2
<h3>How to determine the variation equation?</h3>The variables are give as:
Pressure = P
Radius= r
The direct variation from p to the square of r is represented as:
Express as an equation
p = kr^2
Where k represents the constant of variation
Hence, the variation equation is p = kr^2
Read more about variation at:
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