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

Natalie earns $2.50 for each cd she sells and $3.50 for each dvd she sells.  Natalie sold 45 dvds last year.  She earned a total of $780 last year selling cds a
Which of the following organisms can perform alcoholic fermentation? (1) yeast, (2) humans, (3) bacteria. a. 1 and 2 b. 1 and 3 c. 1 only d. 1, 2, and 3
How many atoms are in 0.750 moles of zinc?
What is the mean of 87, 93, 86, 90, and 84?
An airplane travels 3,260 kilometers in 4 hours. What is the airplane’s average speed?
Which of the kingdoms has the smallest number of known species
Write a system of equations with a solution (4,–3)
How do you Factor c(squared)-8c ??
Jim’s allowance is $1.20 per week. Stan’s is 25¢ per day. How long will they have to save, if they save both their allowances together, before they can get a m
How many atoms are in 0.750 moles of zinc?