7554577 7554577

03-06-2021
Mathematics

contestada

If y varies directly as x and y = 9 when x = –3, find y when x = 40.

Respuesta :

wegnerkolmp2741o wegnerkolmp2741o

03-06-2021

Answer:

y = -120

Step-by-step explanation:

Direct variation is

y = kx where k is a constant

9 = k(-3)

Divide each side by -3

9/-3 = k

-3 = k

y = -3x

Let x = 40

y = -3(40)

y = -120

Answer Link

Otras preguntas

Something nice to tell a girl

True or False: Space is expanding, galaxies are not flying away from each other.

Which Stax artist wrote many of his hit songs, including "Respect," which was later recorded by Aretha Franklin

Which country experienced a civil war in 2005?a) Egyptb) Kenyac) South Africad) Sudan

Prepare an extensive Comparison Table of Energy Resources used in India. (Include conventional, non conventional, potential and stock resources)

The HCF and LCM of two numbers x and y are respectively 27 and 2079 if x is divided by 9 the quotient is 21 then find y

how many angels are in right angle name them

Give the graph of this function f(x), find the following (use only integers) f(3) =

The function f is such that f(x) = 5 + 6x – x2 for x  3 (a) Express 5 + 6x – x2 in the form p – (x – q) 2 where p and q are constants.Using your answer to part

Which set of angle measures could be the measures of the interior angles of a triangle? a. 90°, 42°, and 58° b. 60°, 60°, and 60° c. 100°, 48°, and 42°d. 31°, 7