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GaryK [48]
3 years ago
12

PLEASE HELP ME!! THANKS!! BRAINLIEST IF CORRECT!

Mathematics
2 answers:
-BARSIC- [3]3 years ago
7 0

Answer:

The answer is +2

Step-by-step explanation:

b is the answer

Murrr4er [49]3 years ago
4 0

When the calcium atom loses electrons, it's charge increases by the number of electrons lost.

It loses 2 electrons, so it's charge increases by 2.

The answer is +2

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PLEASE!!!!! HELP ME!!!!!!
kati45 [8]

Answer:

15 = a_1 r^4 (1)

1 = a_1 r^5 (2)

If we divide equations (2) and (1) we got:

\frac{r^5}{r^4}= \frac{1}{15}

And then r= \frac{1}{15}

And then we can find the value a_1 and we got from equation (1)

a_1 = \frac{15}{r^4} = \frac{15}{(\frac{1}{15})^4} =759375

And then the general term for the sequence would be given by:

a_n = 759375 (\frac{1}{15})^n-1 , n=1,2,3,4,...

And the best option would be:

C) a1=759,375; an=an−1⋅(1/15)

Step-by-step explanation:

the general formula for a geometric sequence is given by:

a_n = a_1 r^{n-1}

For this case we know that a_5 = 15, a_6 = 1

Then we have the following conditions:

15 = a_1 r^4 (1)

1 = a_1 r^5 (2)

If we divide equations (2) and (1) we got:

\frac{r^5}{r^4}= \frac{1}{15}

And then r= \frac{1}{15}

And then we can find the value a_1 and we got from equation (1)

a_1 = \frac{15}{r^4} = \frac{15}{(\frac{1}{15})^4} =759375

And then the general term for the sequence would be given by:

a_n = 759375 (\frac{1}{15})^n-1 , n=1,2,3,4,...

And the best option would be:

C) a1=759,375; an=an−1⋅(1/15)

4 0
3 years ago
Find the volume of a cylinder with a radius of 4 in and a height that is 3 times the radius
german

Answer:

Volume of a cylinder: V = π * r² * h ,

Base surface area of a cylinder: A_b = 2 * π * r² ,

Lateral surface area of a cylinder: A_l = 2 * π * r * h ,

Total surface area of a cylinder: A = A_b + A_l ,

Step-by-step explanation:

So, when the radius is tripled, the volume will be 3 squared = 9 times than the previous one.

8 0
3 years ago
Read 2 more answers
Which of the following phrases are equations?
geniusboy [140]

one of them is A but from how you showed me I dont really understand what you put

6 0
3 years ago
Can you simplify the fraction 4/-3 any more​
Svetllana [295]

Answer:

No

Step-by-step explanation:

you can't simplify it anymore no matter how low of a number you simplify it by

6 0
3 years ago
Read 2 more answers
The temperature of a city doubles during the day, and then decreases by 14.1ºF after the sun goes down. The temperature at the e
Minchanka [31]

The temperature at the beginning of the day was 6.2°F

Let x represent the temperature at the beginning of the day.

Since, the temperature of a city doubles during the day, and then decreases by 14.1ºF after the sun goes down, hence:

Temperature at end of day = 2x - 14.1

Also, the temperature at the end of the day is −1.7°F, hence:

2x - 14.1 = -1.7

2x = 12.4

x = 6.2°F

The temperature at the beginning of the day was 6.2°F

Find out more at: brainly.com/question/21105092

7 0
3 years ago
Read 2 more answers
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