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lakkis [162]
4 years ago
9

UGH ONLY EXPERT GIVE ME ANSWER PPL DO WRONG ANSWERS Find the number of rectangles in 6×6 chessboard. ITS NOT 36

Mathematics
1 answer:
lesya692 [45]4 years ago
7 0

Answer:

I think it is 441

Step by step explanation:

To make a rectangle you need to pick any two of the vertical lines, and any two of the horizontal lines. So there would be 91 squares and 441 rectangles.

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Prove : (sec θ - tan θ )^2 = 1 - sin θ /1+sin θ
labwork [276]
(sec x - tan x)^2 \\  \\ = sec^2x - 2 sec x tan x + tan^2 x \\  \\ =(1+tan^2 x) - 2 sec x tan x +tan^2 x \\  \\ =1 - 2 sec x tan x + 2 tan^2 x \\  \\ = 1 - 2tan x(sec x - tan x) \\  \\ =1 - \frac{2 sin x}{cos x} (\frac{1-sin x}{cos x}) \\  \\ = 1 - \frac{2 sin x (1-sin x)}{cos^2 x} \\  \\ =1 - \frac{2 sin x (1-sin x)}{1-sin^2 x} \\  \\ =1 - \frac{2 sin x (1-sin x)}{(1-sin x)(1+sin x)} \\  \\ =1-\frac{2 sin x}{1+sin x}
3 0
3 years ago
-10b+5=7b+5 give in detail
Neporo4naja [7]

Answer:

b = 0

Step-by-step explanation:

-10b + 5 = 7b + 5

-10b + 5(-5) = 7b + 5 (-5)

-10b = 7b Because 5 - 5 = 0

-10b - 7b = -17b/0 = 0

6 0
3 years ago
Read 2 more answers
I am a witch and I'll hex you if you don't know but answer to get the points
Phantasy [73]
Disbeylover us right, the answer is n÷11. I hope this helps
6 0
3 years ago
Chris went to the store to purchase 6.5 gallons of milk. When he got to the store, he noticed that the milk was no longer sold i
Aleks [24]

6.5 gallons = 24.6052 liters

6.5 has 2 significant figures, so it would need to be 25 liters

7 0
3 years ago
Which of the following graphs could be the graph of the function f(x)=-0.08x(x^2-11x+18)?
MariettaO [177]

Answer:

option C

Step-by-step explanation:

f(x)=-0.08x(x^2-11x+18)

Factor the parenthesis and find out the x intercepts

(x^2-11x+18)

We find out two factors whose product is 18 and sum is -11

-9  and -2 gives us product 18

-9  -2 gives us sum -11

(x^2-11x+18) =(x-9)(x-2)

f(x)=-0.08x(x^2-11x+18)

f(x)= -0.08x(x-9)(x-2)

set f(x) =0  and solve for x

-0.08x(x-9)(x-2) =0

-0.08x =0, so x=0

x-9 = 0 , so x=9

x-2 =0 , so x=2

x intercepts are (0,0) (2,0)  and (9,0)

x intercepts are not repeating

so the graph crosses x -axis at x=0, 2,9

option C is correct

The graph is attached below4


5 0
3 years ago
Read 2 more answers
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