MATHEMATICS MIDDLE SCHOOL

Wats was the first number made​

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

hat was the first number created?

For example, the Arabic numeral system we're all familiar with today is usually credited to two mathematicians from ancient India: Brahmagupta from the 6th century B.C. and Aryabhat from the 5th century B.C. Eventually, numbers were necessary for more than simply counting things.
Answer 2
Answer:

Answer:

0

Step-by-step explanation:

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2g - 3 = 35??? help !?

Answers

2g - 3 = 35

Add 3 on both sides

2g = 38

Divide 2 on both sides

g = 19
You add 3 to 35 and divide that by 2
G=19

If every positive number has two square roots and you can find the length of the side of a square window by finding a square root of the area, why isthere only one answer for the length of a side?

Answers

because the 2 square roots are positive and negative
ex
squareroot of 4=2 or -2 since 2 time2=4 and -2 times -2=4
we normally use the principal root or the positive root since legnth in real life cannot be negative

you cannot have a window that is -5 inches long

th enaswe ris because one s negative and cannot be used

Find the area of a square with a side of 20 cm

Answers

Answer:

80 cm

Step-by-step explanation:

This is because the shape is a square, and area is width x height x length.

Since the shape is a square, all sides are the same therefore the answer is 80 cm.

Given f(x) = x -2, if the domain is 5, find the range

Answers

Answer:

Domain: all real numbers

Range: all real numbers

Step-by-step explanation:

There is no restriction on the variable x, so the domain is all reals.

Similarly, the range is all reals as the graph of this function is a line that is neither vertical nor horizontal.

Someone rolls a six sided fair die 5 times. They consider it a success if they have a two or three on a die. Whats the probability of 2 successes? no successes? and at least 3 successes?

Answers

Answer:

2 successes =  80/243

0 successes = 32/243

at least 3 successes = 51/243

Step-by-step explanation:

Lets suppose we had the following sequence of 5 throws:-

2 or 3,  2 or 3 ,  then NOT 2 or 3 on last 3 throws

Probability of this is

1/3 * 1/3 * 2/3 * 2/3 * 2/3 = 8/243

There are  (5*4) / 2 = 10 ways of having this result  ( that is the number of combinations of 2 from  5   =  5C2 ).

So Prob(2 successes) = (8/243) * 10  = 80/243

Prob ( No successes) =  (2/3)^5 = 32/243

Probability of 3 successes = 1/3 * 1/3 * 1/3 * 2/3 * 2/3 *   5C3  

4/243 * 10 = 40 / 243

Probability of 4 successes =  (1/3)^4 * 2/3 * 5C4

= 10/243

Probability of 5 success = (1/3)^5 = 1 / 243

Prob(at least 3 successes) = 51/243

Answer:

2 successes =  80/243

0 successes = 32/243

at least 3 successes = 51/243

Step-by-step explanation:

Lets suppose we had the following sequence of 5 throws:-

2 or 3,  2 or 3 ,  then NOT 2 or 3 on last 3 throws

Probability of this is

1/3 * 1/3 * 2/3 * 2/3 * 2/3 = 8/243

There are  (5*4) / 2 = 10 ways of having this result  ( that is the number of combinations of 2 from  5   =  5C2 ).

So Prob(2 successes) = (8/243) * 10  = 80/243

Prob ( No successes) =  (2/3)^5 = 32/243

Probability of 3 successes = 1/3 * 1/3 * 1/3 * 2/3 * 2/3 *   5C3  

4/243 * 10 = 40 / 243

Probability of 4 successes =  (1/3)^4 * 2/3 * 5C4

= 10/243

Probability of 5 success = (1/3)^5 = 1 / 243

Prob(at least 3 successes) = 51/243

In the equation 6-A/4=-3, what would A be?

Answers

I don't know.  Let's solve it together.  Then we'll both know what 'A' is,
and PLUS, you'll know how to find it.

6 - A/4  =  -3

We want to get 'A' all by itself on one side of the equation,
and everything else on the other side.

Subtract  6  from each side:    - A/4  =  -9

Multiply each side by  4 :      -A  =  -36

Multiply each side by -1 :      A  =  36

Did you follow that ?
-a / 4 + 6 -6 = -3 - 6
-a / 4 * 4 = -9 * 4
-a = -36
a = 36
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