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Darina [25.2K]
2 years ago
7

Which statement about rational and irrational numbers is always true?

Mathematics
1 answer:
DIA [1.3K]2 years ago
5 0

Answer:

D.Any irrational number added to any irrational number is equal to a rational number.

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You are out shopping and you find a shirt that is on sale for 25% off. You decide to buy 3 of the shirts. Write an expression to
Aliun [14]

Let s equal the cost per shirt.

First, we are going to multiply the cost of one shirt to the sale of 25%

0.25s

Second, we are going to multiply by 3 since you are buying 3 shirts.

* 3

Put together.

0.25s * 3

Best of Luck!

5 0
3 years ago
Layla used 0.482 gram of salt in her experiment. Maurice use 0.51 gram of salt. who used the greater amount of salt?
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0.51 grams is < 0.482, thus Maurice has more salt.
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3 years ago
Solve each scientific notation <br><br> PLEASE HELP!!!!!!
vaieri [72.5K]

Answer:

  1. A-610000
  2. A-.0043
  3. A-21000

Step-by-step explanation:

1. =6.1*105

=6.1*(10*10*10*10*10)

=610000

2. =0.43*10−2

=0.43* 1 /10*10

=0.0043

3. 2.1(104)

=2.1*104

=2.1*(10*10*10*10)

=21000

7 0
2 years ago
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A bag contains 7 red and 10 white balls. In how many ways 4 balls are selected if there are more than 2 red balls? (Please solve
erastova [34]

Answer:

385 ways

Step-by-step explanation:

Given;

7 red balls

10 white balls

In how many ways can 4 balls be selected if there are more than 2 red balls.

Selecting 4 balls which must contain more than 2 red balls, will be 3 red balls and 1 white ball to make it 4 in total, or all the 4 balls selected will red balls.

= 3 red balls and 1 white ball  OR 4 red balls

= 7C₃ x 10C₁  + 7C₄

= \frac{7!}{4!3!} *\frac{10!}{9!1!} \ \ + \ \frac{7!}{3!4!} \\\\= (35*10) \ + \ 35\\\\= 350 \ + 35\\\\= 385 \ ways

Therefore, there are 385 ways of selecting 4 balls, if there are more than 2 red balls.

5 0
3 years ago
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Mars2501 [29]

Answer:

49 square miles

Step-by-step explanation:

Sorry on the last question :(

----------------------------------------------------------------------------------------------------------------

Have a good day :)

7 0
3 years ago
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