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3 years ago

Me ayudan por favor

Mathematics

1 answer:

natka813 [3]3 years ago

5 0

Answer:

but I think the first time I have the right kind to be the most beautiful woman in my family who has a good one in her life

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Keiko has seven colors of lanyard. She uses three different colors to make a keychain. How many different combinations can she c

AleksAgata [21]

Combination = doesn't matter what order
Permutation = order matters

There are two methods to work out combinations.

Method 1 List out possibilities
123 124 125 126 127 134 135 136 137 145 146 147 156 157 167
234 235 236 237 245 246 247 256 257 267
345 346 347 356 357 367
456 457 467
567

For a total of 35 combinations.

Method 2 Use a formula.
It's a rather complicated one, so only use it if you have a lot of possibilities.

$\frac{n!}{r!(n-r)!} = \frac{7!}{3!(7-3)!} = \frac{7!}{3!*4!} = \frac{7*6*5*4*3*2*1}{3*2*1*4*3*2*1} = \frac{7*6*5}{3*2*1}=\frac{210}6=35$

(n is the number of choices, r is the amount you choose, and ! is a function that multiplies together all numbers down to 1)

7 0

3 years ago

A point is reflected across the x-axis. The new point is (5 -3.5) What is the distance between the two points?

alukav5142 [94]

Answer:

Step-by-step explanation:

8 0

2 years ago

Need help finding the x-intercept zeros for x(x+2) (x-2)^2

miskamm [114]

X= 0 (multiplicity of 1)
X= -2 (multiplicity of 1)
X= 2 (multiplicity of 2)

6 0

3 years ago

The rabbit population in a certain area is 500% of last years population. There are 900 rabbits this year. How many were there t

12345 [234]

Answer:

180 rabbits

Step-by-step explanation:

The correct question is

The rabbit population in a certain area is 500% of last years population. There are 900 rabbits this year. How many were there last year?

we know that

900 rabbits represent 500% of last year population

Last year population represent 100%

using proportion

Find out how many rabbits represent a percentage of 100%

$\frac{900}{500\%}=\frac{x}{100\%}\\\\x=900(100)/500\\\\x=180\ rabbits$

7 0

3 years ago

Lonely vibes :( 2+2=3x

astraxan [27]

Answer:

ok I got you

Step-by-step explanation:

2+2=3x

or, 4=3x

or, 4/3x

ans:. x=4/3

3 0

2 years ago