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timurjin [86]
3 years ago
13

if no digit appears more than once how mang 2-digit numbers can be formed from the digits 1,3,5, and 7?

Mathematics
2 answers:
Mandarinka [93]3 years ago
8 0

Answer:

12

Step-by-step explanation:

You can choose the first digit 4 ways.

After that and since we want no repeats, we can choose the third digit 3 ways.

4 times 3 =12

svp [43]3 years ago
6 0

Answer:

12               Mark me as brainliest!!

Step-by-step explanation:

how many 2-digit can be formed from the digits...

Combine all the digits without repeating

13, 15, 17

31, 35, 37

51, 53, 57,

71, 73, 75

12 digits

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Wewaii [24]
A prime factor has no multiples and cant be broken down any further
3 0
3 years ago
0.7c - 2.1d<br> c= 13, d = 2<br> 0.7c - 2.1d=
LenaWriter [7]

Answer:

4.9

Step-by-step explanation:

Plug in 13 and 2 for each variable separately to get 0.7(13) - 2.1(2).  0.7 multiplied by 13 equals to 9.1 and 2.1 multiplied by 2 equals 4.2.  Subtract 4.2 from 9.1 to get your final answer which is 4.9.

6 0
3 years ago
Find the length of the hypotenuse of a right triangle with legs of 5 and 13. Round to the nearest tenth, if necessary.
slavikrds [6]
13^2 + 5*2 = 169 + 25 = 194
<span>hypotenuse  =  square root (194) = 13.9

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8 0
4 years ago
Read 2 more answers
add simplify if possible I've already posted this once and I don't know what the answer was correct as somebody can do this I wi
elena55 [62]

Answer: 15 + 53/77


Step-by-step explanation:


Multiplying a fraction by 1 does not change the value.

Any number divided by itself is 1.

For instance, 11/11 = 7/7 = 1.


12 + 1/7 + 3 + 6/11 = 15 + 1/7 + 6/11

= 15 + (11×1)/(11×7) + (7×6)/(7×11)

= 15 + 11/77 + (6×7)/77

= 15 + (11 + 6×7)/77

= 15 + 53/77


It is faster to make sure to multiply by the "smallest" form of one that will work, but you don't have to. You only need to make sure that at the end there are no common factors in numerator and denominator, and that numerator is smaller than denominator.

6 0
4 years ago
Read 2 more answers
Solve for x if AB = 5x and BC = 3x + 24.
NikAS [45]

The value of x according to the given task is; 12.

<h3>What is the value of x?</h3>

It follows from the task content that the value of x is to be determined.

Since, lines AB and BC are both tangent to the circle and they both share a point of intersection; it follows that;

5x = 3x +24

  • collect like terms

2x = 24

  • divide both sides by 2

x = 24/2

x = 12.

Read more on tangent;

brainly.com/question/16507124

#SPJ1

7 0
2 years ago
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