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3 years ago

Out of 120 high school boys and 80 high school girls, 45 tried out for track. Of those 45, 12 were girls.

Mathematics

2 answers:

zubka84 [21]3 years ago

5 0

There are 33 boys who tried the track.
68 girls didnt try the track
87 boys didnt try the track

Molodets [167]3 years ago

3 0

Answer:

Step-by-step explanation:

yes no

Boys: 33 87

Girls: 12 68

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The difference of 5 times y and 3

saul85 [17]

The way to find the difference between 5y - 3 you have to first do the inverse operation of multiplication which is division.

5y - 3
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5 5

y - 0.6

3 0

3 years ago

A. Complete the table if y varies

serious [3.7K]

Direct variation is represented by the equation y = k × x and inverse variation is represented by y = k/x

Table 1:

y = k × x

30 = k × 5

30 = 5k

k = 30/5

k = 6

So,

y = 30

y = 30 k = 6

y = 30 k = 6x = 5

y = 30 k = 6x = 5Equation: y = 6x

y = k × x

y = 10 × 8

y = 80

So,

y = 80

y = 80 k = 10

y = 80 k = 10x = 8

y = 80 k = 10x = 8Equation: y = 10x

y = 3x

18 = 3x

x = 18/3

x = 6

So,

y = 18

y = 18k = 3

y = 18k = 3x = 6

y = 18k = 3x = 6Equation: y = 3x

y = 2x²

72 = 2x²

x² = 72/2

x² = 36

x = √36

x = 6

So,

y = 72

y = 72k = 2

y = 72k = 2x = 6

y = 72k = 2x = 6Equation: y = 2x²

Table 2:

y = k/x

5 = k/6

5 × 6 = k

30 = k

So,

y = 5

y = 5k = 30

y = 5k = 30x = 6

y = 5k = 30x = 6Equation: y = 30/x

y = k/x

y = 36/4

y = 9

So,

y = 9

y = 9k = 36

y = 9k = 36x = 4

y = 9k = 36x = 4Equation: y = 36/x

y = 60/x

20 = 60/x

20x = 60

x = 60/20

x = 3

So,

y = 20

y = 20k = 60

y = 20k = 60x = 3

y = 20k = 60x = 3Equation: y = 60/x

y = 24/x

y = 24/12

y = 2

So,

y = 2

y = 2k = 24

y = 2k = 24x = 12

y = 2k = 24x = 12Equation: y = 24/x

brainly.com/question/472621

3 0

3 years ago

Graph the line of the equation y = 3/2x + 3.

frutty [35]

Used graph

232y-intercept: (0,3)(0,3)xy0326

8 0

2 years ago

A company is expanding its building area from 12,500 square feet to 16,750 square feet. What is the percentage increase of the a

mars1129 [50]

Answer:

I think it’s 34 percent. If not I’m so sorry- but I’m like 99.999999 percent sure about it. Also use percentage calculators they help a lottttt

Love u bye ❤️

Step-by-step explanation:

4 0

3 years ago

The fifth term of a geometric sequence is 781.25. Each term of the sequence is 1/5 of the value of the following term. Which rec

lubasha [3.4K]

The recursive formula of the geometric sequence is $a_{n} = 5a_{n-1}$ and a1 = 1.25

<h3>How to determine the recursive formula?</h3>

The given parameters are:

Fifth term = 781.25

Term = 1/5 * following term

The second parameter above means that:

$a_n = \frac{1}{5} * a_{n+ 1}$

Multiply both sides by 5

$a_{n+1} = 5a_n$

Remove 1 from the terms

$a_{n} = 5a_{n-1}$

Using the formula $a_n = \frac{1}{5} * a_{n+ 1}$ , we have the first term to be:

$a_1 = \frac 15 * a_2$

$a_2 = \frac 15 * a_3$

$a_3 = \frac 15 * a_4$

$a_4 = \frac 15 * a_5 = \frac 15 * 781.25 = 156.25$

So, we have:

$a_3 = \frac 15 * 156.25 = 31.25$

$a_2 = \frac 15 * 31.25 = 6.25$

$a_1 = \frac 15 * 6.25 = 1.25$

Hence, the recursive formula is $a_{n} = 5a_{n-1}$ and a1 = 1.25

Read more about recursive sequence at:

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6 0

2 years ago