isisjoya1
isisjoya1 isisjoya1
  • 23-06-2015
  • Mathematics
contestada

If y varies directly as x and y = 49 when x = 7, what is the value of y when x = 3?

Relax

Respuesta :

pooderss pooderss
  • 23-06-2015
y=21 because 3/21=7 and 7*3=21 so Y=21 
Answer Link
naǫ
naǫ naǫ
  • 23-06-2015
Direct variation:
[tex]y=kx[/tex]

y=49 when x=7.
[tex]49=7k \\ k=\frac{49}{7} \\ k=7[/tex]

y=? when x=3.
[tex]y=7 \times 3 \\ y=21[/tex]

y=21 when x=3.
Answer Link

Otras preguntas

(6,-13);y=2/9x- 5 write it in slope-intercept form
Burgers-o-Rama is the best hamburger place in town. The owner, Ms. Hamm, buys two 5-pound packages of meat for $27.50. Use proportional reasoning to determine t
what are advantages of public borrowing​
5. Which of the following is the clearest and most effective sentence?
What words do you put before a sentence to make it a question?
The fibers of the iliocostalis muscle are divided into which three regions?
they scrambled to their places by the rowlocks
Write √3 ÷5-2V3 in simplest radical form.
What does the body language described in this text tell readers about the characters? Use examples from the text to support your answer
d/4+7/8=6 what does d equal​