Answer:
3m+4 & m+4+2m
Step-by-step explanation:
substitute m=1
3(1)+4 and (1)+4+2(1)
4+3=7 5+2=7
substitute m=4
3(4)+4 4+4+2(4)
12+4=16 8+8=16
The phrase between 7.2 and 7.6 inclusive means:
7.2 ≤ x ≤ 7.6
From the calculation done below, the interest when the rate is 9% is $101.25.
<h3>How interest is calculated using direct variation?</h3>
Since the interest on investment varies directly as the rate of interest, the relevant direct variation formula to use to calculate investment is as follows:
i = kr ................................. (1)
Where:
i = interest amount = $45
k = investment = ?
r = interest rate = 0.04
Substituting the values into equation (1) and solving for k, we have:
45 = k0.04
k = 45 / 0.04
k = $1,125
To find the interest when the rate is 9%, we substitute k = $1,125 and r = 9% into equation (1) as follows:
i = $1,125 * 9% = $101.25
Learn more about interest here: brainly.com/question/26457073.
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