Which of the following could be a real-world description of the quantity four times x end quantity divided by 7?

1 answer:

6 0

The real-world description of the quantity four times x end quantity divided by 7 will be B. The cost per pizza for 4 pizzas divided by 7 people.

<h3>How to illustrate the information?</h3>

It should be noted that the information that is given is illustrated as:

four times x end quantity divided by 7

This will be:

= (4 × x) / 7

Therefore, the real description will be that the cost per pizza for 4 pizzas divided by 7 people.

In conclusion, the correct option is B.

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The variables x and y are inversely proportional, and y = 2 when x = 3. What is the value of y when x = 9?

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Answer:

$\huge \purple{ \boxed{ y = \frac{2}{3} }}$

Step-by-step explanation:

Since, the variables x and y are inversely proportional.

$\therefore \: y \: \: \alpha \: \: \frac{1}{x} \\ \implies \: y = \frac{k}{x} \\ (k = constant) \\ \implies \: xy = k ...(1)\\ plug \: y = 2, \: \: x = 3 \: in \: equation \: (1) \\ we \: find \\ 2 \times 3 = k \\ k = 6 \\ plug \:k = 6 \: in \: equation \: (1) \\ xy = 6 \\ (this \: is \: the \: equation \: of \: variation) \\ when \: x = 9 \: \: y =? \\ \\ 9y = 6 \\ y = \frac{6}{9} \\ \huge \red{ \boxed{ y = \frac{2}{3} }}$