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const2013 [10]
2 years ago
8

Explain how estimation helps you to place the decimal point when multiplying 3.9 times 5.3

Mathematics
1 answer:
lara [203]2 years ago
8 0
I see it like this: we mupliply almost 4 by a little more then 5, so the result will be around 20 (4*5=20) : so the decimal point must be after the 20 (and it is, the result is 20.67
You might be interested in
What is the missing value in the table below?
iVinArrow [24]

A geometric series is the collection of an unlimited number of terms with a fixed ratio between them. The missing value in the table below is 343. The correct option is A.

<h3>What is geometrical series?</h3>

A geometric series is the collection of an unlimited number of terms with a fixed ratio between them.

The given table if closely observed forms a geometric progression, this is because the value of the dependent variable, y is increasing by a common ratio. The common ratio in the table is,

Common ratio = y₂/y₁ = 1/(1/7) = 7

Now, for any geometric progression, the value of the nth term is given as,

Tₙ = a₁ (r)⁽ⁿ⁻¹⁾

where a₁ is the first term of the geometric progression and r is the common ratio. Therefore, the nth term of the series is,

T = a₁ (r)⁽ⁿ⁻¹⁾

Tₙ = (1/7) (7)⁽ⁿ⁻¹⁾

y = (1/7)(7)⁽ˣ⁻¹⁾

Now, the value of the y when the value of x is 5 is,

y = (1/7)(7)⁽ˣ⁻¹⁾

y = (1/7)(7)⁽⁵⁻¹⁾

y = (1/7)(7)⁴

y = (1/7) × 2401

y = 343

Hence, the missing value in the table below is 343.

Learn more about Geometrical Series here:

brainly.com/question/4617980

#SPJ1

8 0
1 year ago
It’s only 10 points but it’s all i got (:
weqwewe [10]

Answer:

Thx a lot

Step-by-step explanation:

4 0
3 years ago
~Please help, 50 Points, and Brainliest if correct!~
algol13

A is the correct answer you are looking for

REMEMBER: (you are beautiful and deserve the world. you deserve to be treated like it. U deserve love, and i know without a shadow of doubt you will find it. you are that amazing. Your story is not to be silenced its your story so own it! If someone decides to walk out of your life.. let them. they don't know what they lost and they are stu.pid for that. They were probably holding you back anyways.

6 0
3 years ago
Read 2 more answers
Please help anyone.​
Burka [1]

Answer:

- \frac{27}{7}

Step-by-step explanation:

Given

f(x) = \frac{3}{x+2} - \sqrt{x-3}

Evaluate f(19) by substituting x = 19 into f(x)

f(19) = \frac{3}{19+2} - \sqrt{19-3}

       = \frac{3}{21} - \sqrt{16}

       = \frac{1}{7} - 4

       = \frac{1}{7} - \frac{28}{7} = - \frac{27}{7}

7 0
3 years ago
20 POINTS!! <br> Which ordered pair is the solution to the system of equations?
marta [7]
Hello! I would love to help!

The answer is -10,-1

Basically, you have to fill -10 in for x and -1 in for y in each equation. If the equations are true, that is the right answer!


Hope this helped! Comment if you have questions!







8 0
3 years ago
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