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Lostsunrise [7]
3 years ago
12

How is a table helpful when constructing equations?

Mathematics
2 answers:
kipiarov [429]3 years ago
5 0
You can graph number and get different coordinates
viva [34]3 years ago
5 0
<span>u can graph # & get different coordinates</span>
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A recent survey found that 7575​% of all adults over 50 wear glasses for driving. In a random sample of 4040 adults over​ 50, wh
malfutka [58]

Answer:

Mean = 30

standard Deviation = 2.74

Step-by-step explanation:

Formula

mean = np

Standard Deviation = \sqrt{npq}

from the question = 40

P = 75% or 0.75

q = 1 - p = 1 - 75% or 1 - 0.75

To find mean

mean = 40 x 0.75

           = 30

For Standard Deviation (SD)

Standard Deviation = \sqrt{npq}

       = \sqrt{40 X 0.75 X 0.25

      = \sqrt{7.5}

:. Standard  Deviation       = 2.74

5 0
2 years ago
In a geometric sequence, if a3 = ‒5 and a6 = 40, determine a1, r, and an. Then write the first three terms of the sequence.
Tresset [83]
a_4=ra_3
a_5=ra_4=r^2a_3
a_6=ra_5=r^3a_3

40=-5r^3\implies r^3=-8\implies r=-2

a_3=ra_2=r^2a_1

-5=(-2)^2a_1\implies a_1=-\dfrac54

You know the first and third terms, a_1 and a_3, so you just need to find the second term a_2:

a_2=ra_1\implies a_2=-2\left(-\dfrac54\right)=\dfrac52
7 0
3 years ago
What is 1 whole 3/10 Plus 2 whole 2/5
seraphim [82]

Answer:

1 7/10

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Round to the place value of $72,471 underlined digit of 7
Varvara68 [4.7K]
The first 7 or the second one ?
8 0
3 years ago
Giving out brainliest answer pls help
Whitepunk [10]

Take a two-digit number. The possible numbers for original number condition are 29, 38, 47, 56, 65, 74, 83, 92.

<u>SOLUTON: </u>

Given, Take a two-digit number. Write it backwards. Add it to the original number. If what you get is a perfect square,

We have to find what could be the original number? Find all answers

Now, let the original number be xy

Then, xy + yx is a perfect square.

⇒ (10x + y) + (10y + x) is perfect square

[ because we can write 21 as 2 x 10 + 1 ]

⇒ (11x + 11y) is a perfect square

⇒ 11(x + y) is perfect square.

11(x + y) to be perfect square x + y should also be 11.

Then, x + y = 11.

Now, possible values of x and y are (2, 9), (3, 8), (4, 7), (5, 6), (6, 5), (7, 4), (8, 3), (9, 1)

(10, 1) is not possible because x range is from 0 – 9 as we took it as digit in xy

Now, the originals numbers xy are 29, 38, 47, 56, 65, 74, 83, 92.

Hence, the possible numbers for original number condition are 29, 38, 47, 56, 65, 74, 83, 92.

7 0
3 years ago
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