Kelly and Greta are asked to write an equation for the scenario below. "One person was able to plant 4 trees in the same amount
2 answers:
Answer:
Greta is correct. The answer is y = 4x
Step-by-step explanation:
This is because one person is able to plant four trees and five people are able to plant 20 in the same amount of time which means 4 trees is to 1 person. In other words if you substitute the values into the equation you will see that x = 1 in the first scenario and x = 5 in second scenario.I will work out the second scenario below.
y = 4x (where y = 20)
20 = 4(x)
5 = x
OR
y = 4x (where x = 5)
y = 4 * 5
y = 20
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Expressions are mathematical statements represented with the variables
The value of 12x^-3 y-1 for x=-1 and y=5 is - 12/5
<h3>How to determine the value of the variable</h3>The expression is given as:
When x = -1, the expression becomes
Evaluate the exponent
When y = 5, the expression becomes
Evaluate the exponent
- 12/5
Hence, the value of 12x^-3 y-1 for x=-1 and y=5 is - 12/5
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It looks like you might have intended to say the roots are 7 + i and 5 - i, judging by the extra space between 7 and i.
The simplest polynomial with these characteristics would be
but seeing as each of the options appears to be a quartic polynomial, I suspect f(x) is also supposed to have only real coefficients. In that case, we need to pair up any complex root with its conjugate to "complete" f(x). We end up with
which appears to most closely resemble the third option. Upon expanding, we see f(x) does indeed have real coefficients: