Yuupppp Yuupppp

16-09-2020
Mathematics

contestada

Find y when x = 9 if y varies directly as the square of x, and y = 245 when x = 7.

Respuesta :

ChoiSungHyun ChoiSungHyun

16-09-2020

Step-by-step explanation:

y is directly proportional to x^2.

This means that y = kx^2, where k is a real constant.

When x = 7, y = 245:

245 = k(7)^2 = 49k. By division, k = 5.

Now we know that y = 5x^2, when x = 9, y = 5(9)^2 = 5 * 81 = 405.

Answer Link

Otras preguntas

BETO: ¿Qué te parecen las celebraciones, abuelo? ABUELO: No están mal. En mi país también había muchas festividades. BETO: ¿Ustedes _[blank 1]_ con desfiles y f

A straight wire carrying a current of 7.2 A has a field of 8.9 10–3 T at right angles to it. What length of wire in the field will experience a force of 2.1 N?

Argon gas has a boiling point of -197 °C. Which of the following diagrams best represents the distribution of argon atoms in a steel sphere at -190 °C?

what is an angiogram??

In the reaction below green chlorine gas and brown iodine chloride forms yellow iodine trichloride Cl2 (g) + ICl (l) ⇌ ICl3 (s) If more iodine trichloride is ad

Genetic modification makes pest-resistant corn, but genetically modified corn may be unhealthy. What type of sentence is this? a. compound-complex b. simple c.

Click marker Graph the linear equation. Find three points with integer valued coordinates that solve the equation, then plot on the graph. 2x - 3y = -6

What happens after passing the Road Test?

How are articles and opinion-editorials similar? Select the best answer from the choices provided. OA Both are only ever written by editors. OB. Both are writte

how do u solve this