3 years ago

How many combinations are there of the five letters j, k, l, m, and n using three letters at a time?

Mathematics

2 answers:

nikdorinn [45]3 years ago

7 0

5 n C r 3 = 10 がんばってね

Oksi-84 [34.3K]3 years ago

7 0

Answer:

5 n C r 3 = 10 がんばってね

Step-by-step explanation:

がんばってね= Do your best

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Gil aunt cut his birthday cake into 32 equal pieces. eighteen pieces were eaten at his birthday party.what fraction of the cake

klasskru [66]

Started out with 32/32. They ate 18/32, 32-18=14; 14/32. To simplify, 7/16 was left.

8 0

3 years ago

What’s the value of X plz hurry it’s due soon

Serhud [2]

Answer:

x = 18

Step-by-step explanation:

The angle vertically opposite (5x + 2) is also (5x + 2), then

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10x = 180 ( divide both sides by 10 )

x = 18

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3 years ago

Twice the difference of a number and 1 is 4 more than that number. Find the numbers using Polyas 4 step

const2013 [10]

Answer:

Step-by-step explanation:

2 times the difference of a number and 1 = 4 plus that number

In other to express the word problem Mathematically ; let the number = x

2(x - 1) = 4 + x

Expand

2x - 2 = 4 + x

Collect like terms

2x - x = 4 + 2

x = 6

Hence, the number is 6

4 0

3 years ago

Solve -7<3x+2<5 (Multiple choice, picture added)

pishuonlain [190]

$\\ \sf\longmapsto -7$

Substract 2 from all sides

$\\ \sf\longmapsto -7-2$

$\\ \sf\longmapsto -9$

Divide all sides by 3

$\\ \sf\longmapsto \dfrac{-9}{3}$

$\\ \sf\longmapsto -3$

Option A is correct

3 0

3 years ago

Read 2 more answers

An automobile shop manager timed 27 employees and recorded the time, in minutes, it took them to change a water pump. Assuming n

SSSSS [86.1K]

Answer:

Excel attached with the solution.

Step-by-step explanation:

Mean

$\bar{x}=\frac{\sum x_{i}}{n}$

Standard deviation

$sd=\sqrt{\frac{\sum (x_{i}-\bar{x})}{n-1}}$

Confidence interval

$\bar{x} \pm z_{\alpha}*sd/\sqrt{n}$

The formulas used are in the Excel file attached.

Download xlsx

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3 years ago