I’ll mark brainliest pleaseeee

A few but not all .

Let's learn some trigonometric identities

[tex] \boxed{\begin{minipage}{6cm} Important Trigonometric identities :- \\ \\ $\: \: 1)\:\sin^2\theta+\cos^2\theta=1 \\ \\ 2)\:\sin^2\theta= 1-\cos^2\theta \\ \\ 3)\:\cos^2\theta=1-\sin^2\theta \\ \\ 4)\:1+\cot^2\theta=\text{cosec}^2 \, \theta \\ \\5)\: \text{cosec}^2 \, \theta-\cot^2\theta =1 \\ \\ 6)\:\text{cosec}^2 \, \theta= 1+\cot^2\theta \\\ \\ 7)\:\sec^2\theta=1+\tan^2\theta \\ \\ 8)\:\sec^2\theta-\tan^2\theta=1 \\ \\ 9)\:\tan^2\theta=\sec^2\theta-1$\end{minipage}}[/tex]

Answer:

[tex]r = 13[/tex]

Step-by-step explanation:

[tex](8r + 5) + (5r + 6) = 180 \\ 13r + 11 = 180 \\ 13r = 180 - 11 \\ 13r = 169 \\ \\ r = \frac{169}{13} \\ \\ r = 13[/tex]

Answer:

x = 18 or -18

Step-by-step explanation:

x^2 + 24^2 = 30^2

simplify

x^2 + 576 = 900

subtract 576 from both sides

x^2 = 324

Take square root of 324

+/- √324

x = 18 x = -18

18 or -18 is the answer

Answer:

CFX, ADC

Step-by-step explanation:

CFX is just a larger version of AEX. Same thing with CFX.

Answer:

90 degrees.

Step-by-step explanation:

Answer:

B) Angles <2 and <6

Step-by-step explanation:

They are corresponding angles

Answer:

21 T-shirts, (this is just a thought of what i think i need to do) Hope it helps

Step-by-step explanation:

I think iv seen this question somewhere so did u forget to put 22?

Here is the explaination if u did...

5T -22 = 83

revenue minus expense = profit

5T = 83+22 = 105

T = 105/5 = 21 T shirts sold

Likened :

8 h 45 min = 0845

0615 + 0845

= 1460

= 1500

It was the afternoon, so the day he leave Mbabane is Friday

#LearnWithEXO

Answer:

2hrs 30 mins on Friday or 2:30 in the afternoon on Friday

Step-by-step explanation:

it took the aero plane 8 h 45 minutes to travel

it reached its destination at 6 : 15 on Friday

to find the time and day it started, we just subtract the time it used to travel from the time and day it landed

which is;

8 45

-6 15

=2 30

that is 2hrs 30mins on Friday

Answer:

Its just a black screen? Maybe repost the question with another picture

Answer:

venti, it has more liquid per ounce

Answer:

the length is $58

Step-by-step explanation:

Answer:

a) 0.35

Step-by-step explanation:

The manager of a food court estimated that he needed 7 pretzels for every 20 people who attend that hockey game. This means that  20 people need/require to have 7 pretzels. 20 people= 7 pretzels.

Answer:

what's the question to this given data?

[tex]( \sqrt{5} + \sqrt{2} {)}^{2} \\ [/tex]

[tex]by \: \: \: using \: \: \: the \: \: \: formula \: \: (a + b) ^{2} = {a}^{2} + 2ab \: + {b}^{2} \: \: we \: \: \: get \\ ( \sqrt{5} {)}^{2} + 2( \sqrt{5}) \: (\sqrt{{2)}} + ( \sqrt{2) }^{2} \\ = \sqrt{5} \times \sqrt{5} + 2 \sqrt{5 \times 2} + \sqrt{2} \times \sqrt{2} \\ = 5 + 2 \sqrt{10} + 2 \\ = 7 + 2 \sqrt{10} [/tex]

(C) 7+2√10

Step-by-step explanation:

Wyzant

ALGEBRA 2 ALGEBRA QUESTION

Ahnaf A. asked • 09/16/15

If a+1/a = 4, what is the of a4+1/a4 ?

IF a + 1/a = 4 . Then what is the value of a4 + 1/a4 ?

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Jon P. answered • 09/16/15

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First, notice that (a + 1/a)2 = 42 = 16. But also, (a + 1/a)2 = a2 + 2a(1/a) + 1/a2 = a2 + 2 + 1/a2 = a2 + 1/a2 + 2

So a2 + 1/a2 + 2 = 16, so a2 + 1/a2 = 14.

Now, do that again...

(a2 + 1/a2)2 = 142 = 196, but also (a2 + 1/a2)2 = a4 + 2(a2)(1/a2) + 1/a4 = a4 + 2 + 1/a4 = a4 + 1/a4 + 2

So a4 + 1/a4 + 2 = 196, so a4 + 1/a4 = 194

You can see the pattern... E.g., a8 + 1/a8 = 1942 - 2, etc.

...welcome...

Answer:

40

Step-by-step explanation:

alternate interior

Answer:

its 40 degrees

Step-by-step explanation:

its said by the top person :)

Answer:

true

Step-by-step explanation:

not 100% sure but I had a question similar a few years back.

Answer:

21√10

Step-by-step explanation:

Answer:

-4 1/2

-4.5

-4.5 / 4 = -1.125

Answer: -1.13, or -1 1/8

Step-by-step explanation:

Answer:  It A. 6 ÷ 3/5 is 10

Step-by-step explanation:

I wasnt sure how to do number line i just did it in my head but hope this helps!

Answer: 10

Step-by-step explanation:

3/5 ÷ 6/1= 3/30

to get 3/30 you do cross multiplication

30÷3=10

I hope this helps you let me know if it did!!

Answer:

$0.57 for each can of cat food

Step-by-step explanation:

2.85/5 = 0.57 giving you the answer

Answer:

it would cost 0.57 cents!

Explanation:

you'd have to divide 2.85 by 5, because if it is that much for 5 cans, and he only wants to buy 1, you'd divide it by 5, to get 0.57 :)

Answer: wrote it down on paper

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

25 and 55

Step-by-step explanation:

Let's call the larger number L and the smaller S

L = 5 + 2×S

And the sum is:

L + S = 80 Subtract S in both sides:

L = 80 - S

Now, substitute this value of L in the first equation:

80 - S = 5 + 2×S Add S in both sides:

80 = 5 + 2×S + S

80 = 5 + 3S Subtract 5 in both sides

75 = 3S Divide both sides by 3

25 = S

We find the value of S, and now we substitute it in the second equation to find the value of L:

L = 80 - 25

L = 55

Answer:

about 110

Step-by-step explanation:

Answer:

(x−2)(x+5)

Step-by-step explanation:

Answer:

Step-by-step explanation:

= > 3x + x^2 - 10

= > x^2 + 3x - 10

= > x^2 + (5 - 2)x - 10

= > x^2 + 5x - 2x - 10

= > x(x + 5) - 2(x + 5)

= > (x - 2) (x + 5) ... factors

Answer:

-x2+21x+3

Step-by-step explanation:

[tex]\\ \sf\longmapsto 9x-(x-3)(x+1)+10x[/tex]

[tex]\\ \sf\longmapsto 9x-(x^2-2x-3)+10x[/tex]

[tex]\\ \sf\longmapsto 9x-x^2+2x+3+10x[/tex]

[tex]\\ \sf\longmapsto 9x+2x+10x-x^2+3[/tex]

[tex]\\ \sf\longmapsto 21x-x^2+3[/tex]