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2 years ago

Please help I will give brainliest!

Mathematics

2 answers:

vladimir2022 [97]2 years ago

4 0

Answer:

The correct answer is B. 30.

Step-by-step explanation:

538 - 509 = 29

Since we need to round this to the nearest tens place, that means we need to round it to 10, 20, 30, etc.

When rounding a number, you look at the last number in it. If it is a 5 or higher, you round up the number before it by 1. If it is a 4 or lower, the number before it stays the same and the lowest number turns into a 0.

Since 9 is higher than 5, the 2 in 29 will turn to a 3, and the 9 will turn into a 0.

Therefore, the correct answer is B. 30.

Hope this helps! :D

Gwar [14]2 years ago

3 0

Answer:

Step-by-step explanation:

538 = 540

509 = 510

40 - 10 = 30

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How many whole numbers are there between 20 and 30

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There are 9 whole numbers in between 20 and 30

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2 years ago

The discount place on three computer are 4/5 1/4 and 3/10 which one has the highest price

lesya [120]

Answer:

4/5

Step-by-step explanation:

4/5 = 80%

1/4 = 25%

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3 years ago

Takashi Caldwell has health insurance that pays 80 percent of coverage charges after a $150 deductible. She received a statement

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Subtract the deductible from the total:

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Takashi then needs to pay 20% of what is left.

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2 years ago

Suppose we write the numbers $1,2,3,4,5,6$, and then color each number red or blue. The coloring is called factorific if there i

Oxana [17]

Answer:

The probability that his coloring is factorific is 0.28125

Step-by-step explanation:

For calculate the probability is necessary to identify the total number of ways to color the six number. This can be calculate with the rule of multiplication as:

2*2*2*2*2*2=64

Because we have 2 options to color every number.

For know the number of ways in which the coloring is factorific, first we need to identify the divisors of each number:

1: the divisor is 1

2: The divisors are 2 and 1

3: The divisors are 3 and 1

4: The divisors are 4, 2 and 1

5: The divisors are 5 and 1

6: The divisors are 6, 3 and 1

From these information we analyse that for made a factorific coloring, is necessary that the number 1 is color blue. Additionally if the number 4 is color blue, the number 2 needs to be color blue and if the number 6 is blue, the number 3 needs to be blue.

So, the number of ways in which we can create a factorfic number is determined by the following cases:

The number 2 is blue and the number 3 is blue: In this case we have 1 option for number 1, one for number 2 and 1 for number 3. Taking into account that the number 2 and 3 are blue, if the number 4 and 6 are blue or red doesn't change the fact that the coloring is going to be factorific. So, we have two options for number 3 and 2 options for number 6. Finally the color of the number 5 is independent of the colors of number 2 and 3, so we also have 2 options for coloring number 5 and the coloring is going to be factorific. Then the number of ways for this situation is calculate as:

1 * 1 * 1 * 2 * 2 * 2 = 8

number 1 number 2 number 3 number 4 number 5 number 6

At the same way we can calculate the following cases:

The number 2 is blue and the number 3 is red: If the number 3 is red, the coloring is only going to be factorific is number 6 is red. Then the number of ways for this situation is calculate as:

1 * 1 * 1 * 2 * 2 * 1 = 4

number 1 number 2 number 3 number 4 number 5 number 6

The number 2 is red and the number 3 is red: If the number 2 and 3 are red, the coloring is only going to be factorific is number 4 and 6 are red. Then the number of ways for this situation is calculate as:

1 * 1 * 1 * 1 * 2 * 1 = 2

number 1 number 2 number 3 number 4 number 5 number 6

The number 2 is red and the number 3 is blue: If the number 2 is red, the coloring is only going to be factorific is number 4 is red. Then the number of ways for this situation is calculate as:

1 * 1 * 1 * 1 * 2 * 2 = 4

number 1 number 2 number 3 number 4 number 5 number 6

If we sum all the cases, we obtain 18 ways to make a factorific coloring. So the probability can be calculated as:

$P= \frac{18}{64} = 0.28125$

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2 years ago

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3 years ago