3 years ago

OMG PLEASE HELP ME PLESE

Mathematics

1 answer:

slava [35]3 years ago

7 0

Answer:

use demos

Step-by-step explanation:

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A physical education class has 21 boys and 9 girls. Each day, the teacher randomly selects a team captain. Assume that no studen

DiKsa [7]

Answer: 0.09

Step-by-step explanation:

From the question, in a physical education class, there are 21 boys and 9 girls. Each day, the teacher randomly selects a team captain randomly.

The probability that the team captain will be a girl two days in a row assuming no student is absent will be:

Boys = 21

Girls = 9

Total = 21 + 9 = 30

P(pick a girl) = 9/30 = 3/10 = 0.3

P(pick a girl 2 days in a row) = (0.3)²

= 0.09

6 0

3 years ago

Show all ways you can use to find the area of the rectangle

marin [14]

• WxL (width multiplied by length)!l
• creating a two right angled triangles, finding the area through the Pythagoras theorem for both triangles and then add both areas together

6 0

3 years ago

Kim owes her friend $245 and plans to pay $35 per week. Write an equation of the function that shows the amount Kim owes after x

inysia [295]

245 -35x = amount owed after x weeks

3 0

3 years ago

How do you determine whether you are finding a percent of increase or a percent of decrease between two values? Explain.

Slav-nsk [51]

Answer:

Increase:

It will have increase when y>x

so, percentage of increase is

$=\frac{y-x}{x}\times 100$

Decrease:

It will have decrease when x>y

so, percentage of decrease is

$=\frac{x-y}{x}\times 100$

Step-by-step explanation:

Let's assume initial value as x

assume final value as y

Increase:

It will have increase when y>x

so, percentage of increase is

$=\frac{y-x}{x}\times 100$

For example:

Initial value is 40

So, x=40

Final value is 50

so, y=50

now, we can find percentage in increase

$=\frac{50-40}{40}\times 100$

$=25$

Decrease:

It will have decrease when x>y

so, percentage of decrease is

$=\frac{x-y}{x}\times 100$

For example:

Initial value is 50

So, x=50

Final value is 40

so, y=40

now, we can find percentage in decrease

$=\frac{50-40}{40}\times 100$

$=25$

3 0

4 years ago

A student scores 74,87,68,63,76 on his last five exams. His teacher will drop the lowest grade to compute the student's average.

den301095 [7]

Answer: 76.25

Average is the sum of numbers divided by the number of numbers

74 + 87 + 68 + 76 = 305

305 / 4 = 76.25

7 0

3 years ago