answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
siniylev
1 month ago
12

The percent decrease from 12 to 9 is equal to the percent decrease from 40 to what number

Mathematics
1 answer:
Leona [12.6K]1 month ago
8 0
(12 - 9) / 12 = (40 - x) / 40
3/12 = (40 - x) / 40
40(1/4) = 40 - x
10 = 40 - x
10 - 40 = -x
-30 = -x
30 = x <=== percentage decrease from 40 to 30
You might be interested in
I JUST NEED THESE 3 QUESTIONS
AnnZ [12381]

Answer:  

 

1.     What are the amplitude and period of the sine function that indicates the positioning of the band members as they start performing?

Answer:  The amplitude is 80 ft and the period is 60 ft.

 

2.     Edna, seated in the stands, faces Darla and notices that the sine curve starts rising from the left edge of the field. What is the equation for the sine function representing the arrangement of band members at the beginning of their performance?

Answer:  y = 80cos(x*π/30)+80

 

3.     When the band starts playing, the members move away from the edges, and the sine curve changes to start decreasing at the far left. Darla remains in her position. Now the sine curve is half as tall as it originally was. What is the equation for the updated sine curve depicting the band members' positions?

Answer: y = 40cos(x*π/30)+80

 

4.     Finally, the entire band shifts closer to the edge of the football field, causing the sine curve to now position itself in the lower half of the field from Edna’s perspective. What is the equation for this sine curve reflecting the band members' positions after these adjustments?

Answer:  y = 40cos(x*π/30)+40

Step-by-step explanation:

8 0
1 month ago
A taxi company charges $3 per ride plus $1.50 fo each mile traveled. Andrea wants to spend no more than $24 on the taxi ride. Ho
AnnZ [12381]
The answer is C since 24-3=21, followed by 21/1.50=14 
6 0
19 days ago
Olga Decorat blankets with ribbon she has 12 yards of ribbon she uses 22 feet of the ribbon to decorate blankets after she decor
Svet_ta [12734]

Response:

  14 feet

Detailed explanation:

<pThere are 3 feet for each yard, resulting in a total of 36 feet in 12 yards. The leftover ribbon will equal the initial amount minus what has been utilized.

  36 - 22 = 14.... feet left

3 0
1 month ago
A veterinarian surveys her clients and finds that 32 percent of the households have dogs, 25 percent have cats, and 11 percent h
babunello [11817]

Answer:

C and D

Step-by-step explanation:

6 0
1 month ago
Read 2 more answers
A music app charges $2 to download the app plus $1.29 per song downloaded. Write and solve a linear equation to find the total c
Leona [12618]
1.29(30) +2 Step-by-step explanation: Begin by calculating 1.29 multiplied by 30, which results in 38.7. Next, add 2 to this sum to arrive at 40.7. Consequently, the total expense amounts to $40.70.
6 0
18 days ago
Other questions:
  • Kane is training for a marathone. He started by running 3 miles during every training session. Each week plans to increase the d
    7·1 answer
  • 2. Ilang kontinente ang bumubuo sa daigdig?<br>A. 5<br>B. 6<br>C. 7<br>D. 8<br>D
    12·1 answer
  • You need to haul a load of patio bricks to a job site. each brick weighs 4 pounds 14 ounces. your truck can carry a 3/4-ton load
    13·1 answer
  • Parker invested $7,800 in an account
    10·1 answer
  • On a rectangular soccer field, Sang is standing on the goal line 20 yards from the corner post. Jazmin is standing 99 yards from
    5·1 answer
  • Research reports indicate that surveillance cameras at major intersections dramatically reduce the number of drivers who barrel
    8·1 answer
  • A direct variation function contains the points (–9, –3) and (–12, –4). Which equation represents the function?
    7·2 answers
  • The function, f(x) = 70n-400, models the profit if the instructor of a guitar class per month, where n is the number of students
    11·1 answer
  • Farmer John walks his pet pig around his barn every day. The barn is 25
    14·1 answer
  • 4. On square JKLM below, if J is located at
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!