batterup490
batterup490 batterup490
  • 08-03-2020
  • Mathematics
contestada


Given ƒ(x) = 3x + 9, find x when ƒ(x) = 21.

Respuesta :

sophia808
sophia808 sophia808
  • 08-03-2020
3x + 9 = 21
3x = 12
x = 4
Answer Link
amandapowller06 amandapowller06
  • 08-04-2020

Answer:

4

Step-by-step explanation:

ƒ(x) = 3x + 9; Substitute 21 for ƒ(x).

21 = 3x + 9

21 − 9 = 3x

12 = 3x → x = 4

Answer Link

Otras preguntas

Three-month-old nolan is no longer interested in a puppet head. this is probably because he has become _____.
The sum of three and twelve times a number is 363. What is the number ?
You are running a fuel economy study. One of the cars you find is blue. can travel 35 1/2 miles on 1 1/4 gallons of gasoline. Another car is red. It can travel
Can you please help me to answer the questions at the end??
What is the passage describing? Sally was proud of herself for talking about the issue with her best friend. It all worked for the best. A. resolution B. charac
Your food costs are 2250. Your total food sales are 25000. What percent of your food sales do the food costs represent?
Solve 2(sin^2(90°) - 2 sin 90° * cos 90° + cos^2(90°))
Find the equation of the line through the point (-4,-5) and perpendicular to y=-1.
if 9 is p percent of 17, then p is a number between what
why does tituba plead guilty to witchcraft