There are 39 students.The number of students that play football is twice as much as the number of students that play volleyball.9 students play both sports.WHAT IS THE NR OF STUDENTS THAT ONLY PLAY FOOTBALL?

Answers

Answer 1
Answer:

Answer:

17

Step-by-step explanation:

There are a total of 39 students.

students.

The number of students that play football is twice as much as the number of students that play volleyball.

Let the number that plays volleyball be x then the number that plays football will be 2x. This we have

x + 2x = 39

3x = 39

x = 13

The total number that plays volleyball is 13.

The total number that plays football will be 2 x 13 = 26

Since 9 students play both sports, the number of students that plays only football will be 26 - 9 = 17.


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A car with a cost of $25,000 is decreasing in value at a rate of 10% each year. The function g(t)= 25,000(0.9)^t gives the value of the car after t years. When will the value of the car be about $12,000? A) after 7 years B) after 9 years C) after 13 years Could you also explain how to do it?

Answers

                                                 12,000 = 25,000 (0.9)^(t)
Divide both sides by 25,000 →    0.48 = (0.9)^(t)
Convert to log form →         log_(0.9) 0.48 = t
Use the change of base formula → (log 0.48)/(log 0.9) = t
Plug into the calculator →  6.966 = t

Answer: A

Help me please
It about linear equations

Answers

Answer:

plant 1 i think

Step-by-step explanation:

Answer:

Plant 2 grew faster

Step-by-step explanation:

The slope of plant 1 is 3

(each day the plant grew 3cm)

The slope of plant 2 is 5

(each day the plant grew 5cm)

The slope of plant 3 is 1.5

(each day the plant grew 1.5cm)

To make a specific hair dye, a hair stylist uses a ratio of 1 1/8 oz of red tone, 3/4 oz of graytone, and 5/8 oz of brown tone. If the stylist needs to make 20 oz of dye, how much of
each dye color is needed

Answers

Answer:

We can call the amounts of red, gray, and brown dye 1 1/8x, 3/4x and 5/8 x respectively and we can write the equation:

1 1/8x + 3/4x + 5/8x = 20

2 1/2x = 20

x = 8 which means that the stylist needs 1 1/8 * 8 = 9 oz red, 3/4 * 8 = 6 oz gray and 5/8 * 8 = 5 oz brown.

This is to help my wonderful mother. What is 1/3rd of 4 1/2s and 8 1/4s?

Answers

4 1/2 = 9/2
8 1/4 = 33/4

1/3 x 9/2 = 3/2
1/3 x 33/4 = 33/12

HELP FAST!!!!!!   What percent of 51 is 42? If necessary, round to the nearest tenth of a percent.a)0.8%
b)45.2%
c)121.4%
d)82.4%

Find the percent of decrease from 280 to 210. Round to the nearest tenth of a percent if necessary.

a)133.3%
b)0.3%
c)25%
d)33.3%

Answers

42/51 = 14/17
14/17 x 100 = 82.35294
=82.4%

280=100%                             
210=x%       ( cross multiply)

280X=21000
X=75%
        


Nth term for this sequence 45,40,35,30

Answers

(n-5)+45
where n is the number, you always take away 5 and you add 45 because that is the first number of the sequence

Final answer:

The nth term for the given arithmetic sequence 45, 40, 35, 30 is 50 - 5n.

Explanation:

The given sequence

45, 40, 35, 30

is an arithmetic sequence with a common difference of -5.

The general formula for the nth term (an) of an arithmetic sequence is:

an = a1 + (n-1)d

where a1 is the first term and d is the common difference.

Plugging in the values from the given sequence, we can find the nth term:

an = 45 + (n-1)(-5)

Simplifying further, we get:

an = 50 - 5n

So, the nth term of the sequence is 50 - 5n.

Learn more about Arithmetic Sequence here:

brainly.com/question/32830972

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