barbiana barbiana
  • 03-07-2019
  • Mathematics
contestada

assume y varies directly as x if y = 7 when x=3 find x when y=21

Respuesta :

eddiezarate12 eddiezarate12
  • 03-07-2019

Answer:

x=9 when y=21

Step-by-step explanation:

I used cross multiplication

7:3=21:x

7x=63

x=9

Answer Link

Otras preguntas

How do I change 36 to 360
Sam evaluated the expression x2y for x = 7 and y = 9. He got a value of 49. Which of the following statements is correct
If five slices of pizza cost $5.50, how much do two slices cost? Ten slices? Half a slice ?
The length of Marshall's poster is 2 times its width. If the perimeter is 72 inches, what is the area of the poster?
list the six enternal parts or peripherals of a computer system and identify which are output and which are input devices?
What two numbers has a lcm of 50
Give 5 natural examples of unbalanced forces around us. Other than friction.
A jar contains 133 pennies. a bigger jar contains 1 2/7 times as many pennies. what is the value of the pennies in the bigger jar?
Which three countries have the least access to technology?
which term better describes political parties in american politics: division or unifying?