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velikii [3]
2 years ago
11

Please i need the step-by-step solution please thank you ​

Mathematics
2 answers:
nekit [7.7K]2 years ago
4 0

Answer:

6. option d

7.option c

Step-by-step explanation:

..........

Sergio [31]2 years ago
3 0

Answer:

Question 6: -8

Question 7: C

Step-by-step explanation:

Question 6:

The reason question 6 is -8 is because of the distance in between each number, e.g -7 and -15. This is not to be confused with + 8 each time that would make the sequence 9, 18, 27.

Question 7:

The way we solve this question is using the nth term rule, whatever is before the n is the times tables we follow. So if it is 2n the sequence would be 2, 4, 6, 8 etc. However when we add something like the -2 we do the 2 times tables but this time we -2 for each one. Example: 2 - 2 = 0 so the first number of the sequence is 0, Example 2: 4-2 = 2 so the second number of the sequence is 2.

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HELP!!! PLEASE!!!!
yuradex [85]

Answer:

50 degrees.

Step-by-step explanation:

The angles of a triangle will always add up to be 180, so add and subtract to find the missing value. :)

4 0
3 years ago
Read 2 more answers
How do you do series with an n
SOVA2 [1]
The problem can be solved step by step, if we know certain basic rules of summation.  Following rules assume summation limits are identical.
\sum{a+b}=\sum{a}+\sum{b}
\sum{kx}=k\sum{x}
\sum_{r=1}^n{1}=n
\sum_{r=1}^n{r}=n(n+1)/2

Armed with the above rules, we can split up the summation into simple terms:
\sum_{r=1}^n{40r-21n+8}=n
=40\sum_{r=1}^n{r}-21n\sum_{r=1}^n{1}+8\sum_{r=1}^n{1}
=40\frac{n(n+1)}{2}-21n^2+8n
=20n(n+1)-21n^2+8n
=28n-n^2

=> (a) f(x)=28n-n^2
=> f'(x)=28-2n 
=> at f'(x)=0 => x=14
Since f''(x)=-2 <0  therefore f(14) is a maximum
(b) f(x) is a maximum when n=14

(c) the maximum value of f(x) is f(14)=196
4 0
2 years ago
the price of stock decrease $2 per day for 4 days consecutive days what was the total change in the value of the stock over the
ikadub [295]
Each day it decrease $2. So just multiply $2 x 4 days. It changed a total of $8.
7 0
3 years ago
Read 2 more answers
What's the radius of a circle with an area of 64 square feet?
umka21 [38]

The answer is A. 4.51 ft.    Hope this helps! :)
6 0
3 years ago
Read 2 more answers
PLEASE HELP AND SHOW WORK I RLLY NEED TO PASS
Alex787 [66]

40×4×4=640

b=20 h=4

using formula:

1/2×base×height

1/2×20×4=40

its says scale by factor 4:

b=80 h=16

using formula:

1/2×base×height

1/2×80×16=640

answer------>>>>640cm^2

8 0
3 years ago
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