The coefficient of -7x is -7, since -7 is the number being multiplied by x.

Similarly, the coefficient of 9/4y is 9/4, since it is the number being multiplied by y.

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7 0

3 years ago

The amount of simple interest earned I, on an investment over a fixed amount of time ????, is jointly proportional to the princi

AleksAgata [21]

Answer:$920

Step-by-step explanation:

Since the variation is joint, I=KPr where k is the constant of proportionality.

Plugging in the values of I=$375, P=$1500 and r=5% in the equation I=KPr, the value of k can be calculated. Hence, the formula connecting the three quantities (I,P and r) can be generated.

375 = K (1500×5)

Making k the subject of change,

K = 375/(1500×5)

K=1/20

Formula connecting the three quantities :I =Pr/20

when P=$2300, r=8%,

I = (2300×8)/20

I = $920

3 0

3 years ago