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LuckyWell [14K]
2 years ago
8

HURRYYY !!! it's a test !!!!! pls help. i'll give you brainliest and 15 points. pls show work !!!!

Mathematics
1 answer:
NARA [144]2 years ago
6 0

Answer:

mm... Just do 42 x 2 Then Bam your answer!! tell me if it doesnt work!

Step-by-step explanation:

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Marcus has a square shaped garden that has an area of 4(x^2-y^2) square feet. If the garden has four equal sections, what is the
SpyIntel [72]

Answer:

x^2-y^2

Step-by-step explanation:

took a quiz and got it right

8 0
2 years ago
Please help me out if possible!
oksano4ka [1.4K]

Answer:

<h2><u>111°</u></h2>

Step-by-step explanation:

Hi,

So lets answer this question;

Here we know that:

69° + z = 180° [Straight angle or Supplementary angle]

⇒ z = 180° - 69°

      = <u>111°</u>

3 0
3 years ago
Please help me out, i can not understand this, i will give a brainliest out to whoever can help me
marishachu [46]

Answer:

So try 0-6

Step-by-step explanation:

6 0
2 years ago
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
Formula for the sum of angles of a triangle: A+B+C=180 degrees, for C
nevsk [136]
A + B + C = 180
<span>C = 180 - A - B </span>

5 0
3 years ago
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