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Natalka [10]
3 years ago
11

A, B and C are collinear points. B is between A and C. AB=12 BC=18 AC=3x Find X.

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
3 0

Answer:

x =10

Step-by-step explanation:

Given

AB = 12

BC = 18

AC = 3x

Required

Solve for x

Since B is in between both points, then:

AC = AB + BC

This gives

3x = 12 + 18

3x = 30

Divide by 3

x =10

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An experiment involves 30 participants. From these, a group of 4 participants is to be tested under a special condition. How man
zheka24 [161]

Answer:

7

Step-by-step explanation:

7*4=28 which is the closest u can get to 30 with out going past it

6 0
3 years ago
If five numbers are selected at random from the set {1,2,3,...,20}, what is the probability that their minimum is larger than 5?
Zanzabum

Answer:

the probability that their minimum is larger than 5 is 0.2373

Step-by-step explanation:

For calculate the probability we need to make a división between the total ways to selected the 5 numbers and the ways to select the five numbers in which every number is larger than 5.

So the number of possibilities to select 5 numbers from 20 is:

<u>20                </u> * <u>      20         </u>*  <u>        20     </u> *<u>        20         </u>* <u>       20 </u>

First number  2nd number   3rd number  4th number   5th number

Taking into account that a number can be chosen more than once, and the order in which you select the numbers matters, for every position we have 20 options so, there are  20^{5} ways to select 5 numbers.

Then the number of possibilities in which their minimum number is larger than 5 is calculate as:

<u>15                </u> * <u>      15         </u>*  <u>           15     </u> *<u>        15          </u>* <u>       15 </u>

First number  2nd number   3rd number  4th number   5th number

This time for every option we can choose number from 6 to 20, so we have 15 numbers for every option and the total ways that satisfy the condition are  15^{5}

So the probability P can be calculate as:

P=\frac{15^{5} }{20^{5} } \\P=0.2373

Then the probability that their minimum is larger than 5 is 0.2373

7 0
3 years ago
PLEASE HELP ASAP!!!!! WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER!!!!!
vlabodo [156]
I believe it is D, hope this helped
4 0
3 years ago
Solve for x 13x+5=149 degrees
Stella [2.4K]

First:

Subtract 5 on each side of the equals sign to cancel it out. You should get 13x=144.

Next:

Divide 13 from each side of the equals sign to get x by itself.

Answer:

X=11.0769230769. You may need to round it up to 11.08 or 11.1 depending on how your teacher normally has you answer

7 0
3 years ago
What is the cube of 8
My name is Ann [436]
8 cubed, 8^3, is the number you get when multiplying 8 times 8 times 8. It can also be looked at as exponentiation involving the base 8 and the exponent 3.

8^3 = 512
8 x 8 x 8 = 512
5 0
3 years ago
Read 2 more answers
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