Q10: Ratios — Compound Proportionality

Question 1

Suppose x, y and z are variables taking positive real numbers as their possible values. It is given that y is directly proportional to $x^{2}$ and x is inversely proportional to z. For $z=rac{7}{25}$, the values of x and y are 5 and 50, respectively. If $y=98$, what is z equal to?

Answer

\frac{1}{7}

Question 2

Suppose x, y and z are variables taking positive real numbers as their possible values. It is given that y is directly proportional to $x^{2}$ and x is inversely proportional to z. For $z=rac{7}{25}$, the values of x and y are 5 and 50, respectively. If $y=98$, what is z equal to?

Accepted Answer

\frac{1}{5}

Question 3

Suppose x, y and z are variables taking positive real numbers as their possible values. It is given that y is directly proportional to $x^{2}$ and x is inversely proportional to z. For $z=rac{7}{25}$, the values of x and y are 5 and 50, respectively. If $y=98$, what is z equal to?

Answer

\frac{5}{7}

Question 4

Suppose x, y and z are variables taking positive real numbers as their possible values. It is given that y is directly proportional to $x^{2}$ and x is inversely proportional to z. For $z=rac{7}{25}$, the values of x and y are 5 and 50, respectively. If $y=98$, what is z equal to?

Answer

1

Ratios — Compound Proportionality

Question

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