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2 years ago

Peirce swims 10 laps in a pool in 8 minutes how much time does it take him to swim 1 lap

Mathematics

1 answer:

Jobisdone [24]2 years ago

7 0

10 laps in 8 minutes

--------------------------------

1 lap in 8/10 (4/5) of a minute

Answer is B, 8/10 minute!

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Please help! Can someone please help me with numbers 5 & 7?

MariettaO [177]

Answer:

Infinity minus 9 is infinity-9

Step-by-step explanation:

8 0

2 years ago

A 20-person fraternity is making their weekend plans around 5 different parties in IV. Each brother will attend exactly one of t

skad [1K]

Answer:

3876

Step-by-step explanation:

Given the following :

Fraternity members = 20

They are to attend 5 different parties in groups of 4

Meaning a group = 4 persons

Atleast one brother will attend exactly one of the parties. (the brothers are indistinguishable).

Then, exactly one brother at a party (20 - 1) = 19, since they are indistinguishable.

Group members are in 4's

19C4

From: nCr = n! /(n-r)! r!

19C4 = 19! / (19 - 4)! 4!

= 19! / 15! 4!

= (19 * 18 * 17 * 16) / (4 * 3 * 2)

= 93024 / 24

= 3876

3 0

3 years ago

I was doing my homework and got confused on this question.

spayn [35]

We will determine the length of the segment DF as follows:

*We have that the triangles are similar, and therefore the following is true:

$\frac{2}{1.34}=\frac{4}{DF}$

Now, we solve for DF:

$\Rightarrow DF=\frac{1.34\cdot4}{2}\Rightarrow DF=2.68$

From this, we have that the length of the segment DF equals 2.68 units.

4 0

1 year ago

Jamie is training for a race and is running laps around a field. If the distance around the field is 350 yards, how many complet

Feliz [49]

First convert 6 miles to yards. That would be 10,560 next divde it by 350 to get 30.1786 but you have to round it to the next lap. Therfore, youll have to run a total of 31 laps around the field.

6 0

3 years ago

For party decorations, you buy 6 rolls of crepe paper and 20 balloons for $11.90. After you start decorating, you determine that

Morgarella [4.7K]

Answer:

Find out the how much did each roll of crepe paper cost .

To prove

Let us assume that the cost of the roll of crepe paper be x.

Let us assume that the cost of the balloon be y .

As given

For party decorations, you buy 6 rolls of crepe paper and 20 balloons for $11.90.

Than the equation becomes

6x + 20y = 11.90

As given

After you start decorating, you determine that you need more party decorations.

You buy 2 more rolls of crepe paper and 15 more balloons for $6.05.

Than the equation becomes

2x + 15y = 6.05

Than two equations are

6x + 20y = 11.90 and 2x + 15y = 6.05

Multiply 2x + 15y = 6.05 by 3 and subracted with 6x + 20y = 11.90

6x - 6x + 45y -20y = 18.15 - 11.90

25y = 6.25

$y = \frac{6.25}{25}$

y = $0.25

Put in the equation 2x + 15y = 6.05

2x + 15 × 0.25 = 6.05

2x = 6.05 - 3.75

2x = 2.3

$x = \frac{2.3}{2}$

x = $1.15

Therefore the each roll of crepe paper cost is $1.15 .

6 0

3 years ago

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