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Zepler [3.9K]
3 years ago
9

A number, x, rounded to 1 decimal place is 3.7Write down the error interval for x.​

Mathematics
1 answer:
alekssr [168]3 years ago
4 0

Answer:

3.65 \leqslant x \leqslant 3.75

Step-by-step explanation:

The error in rounding a number is half of the unit of measure.

The number was rounded to the nearest 0.1 unit so the error is 1/2×0.1, which equals 0.05.

Now we add 3.7 and 0.05, which equals 3.75 and we also take 3.7 - 0.05, which equals 3.65

So, the error interval is:

3.65 \leqslant x \leqslant 3.75

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Try using negative numbers

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3 years ago
The floor of a rectangular living room is 21 feet by 28 feet. What is the distance between
swat32

Answer:

35 feet.

Step-by-step explanation:

To find this, we will need to use the Pythagorean theorem to solve for the diagonal length. Call this diagonal length 'd'.

d² = 21² + 28²

d² = 1225

d² = 35.

Thus, the diagonal length is 35 feet.

3 0
3 years ago
The question is in the picture.
harkovskaia [24]

Answer:

1. 3sqrt(2)

Choice C

2. 2sqrt(3)

Choice D

Step-by-step explanation:

1.  sqrt(x+3)

sqrt(15+3)

sqrt(18)

sqrt(9*2)

sqrt(9)sqrt(2)

3sqrt(2)

Choice C


2.  6/sqrt(x)

6/sqrt(3)

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6sqrt(3)/3

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8 0
2 years ago
Five years from now, the sum of the ages of a women and her daughter will be 40 years. The difference in their present age is 24
CaHeK987 [17]

Answer:

Her daughter is <u>3 years</u> old now.

Step-by-step explanation:

Given:

Five years from now, the sum of the ages of a women and her daughter will be 40 years.

The difference in their present age is 24 years.

Now, to find how old is her daughter now.

Let the age of daughter be x\ years.

And the age of mother be y\ years.

According to question:

(x+5)+(y+5)=40

⇒ x+y+10=40

<em>Subtracting both sides by 10 we get:</em>

⇒ x+y=30

⇒ x=30-y............( 1 )

Now, as given in question:

The difference in their present ages is 24 years.

x-y=24

Putting the equation ( 1 ) in the place of x we get:

⇒ (30-y)-y=24

⇒ 30-2y=24

<em>Moving variable on one side and the numbers on the other:</em>

⇒ 30+24=2y

⇒ 54=2y

<em>Dividing both sides by 2 we get:</em>

⇒ 27=y

So, <em>the age of the mother is 27 years.</em>

Now, putting the value of  y in equation( 1 ) we get:

x=30-27

⇒ x=3

<em>The age of daughter is 3 years.</em>

Therefore, her daughter is 3 years old now.

4 0
2 years ago
Jessica has $35. She gives 2/5 of her money to her sister. How much money did she give her sister?
Ber [7]
$14 - covert 2/5 to a decimal (or percentage) = 0.4 (40%) and then multiply by 35.
5 0
3 years ago
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