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Artyom0805 [142]
2 years ago
10

2. What is the slope passing through the points (2, -1) and (-4, 11)

Mathematics
1 answer:
algol [13]2 years ago
4 0

Answer:

I believe it is y equals 3 minus 2x.

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Would appreciate some help with this:<br><br> Verify (sinq+cosq)^2 - 1 = sin2q
Phantasy [73]

Hello from MrBillDoesMath!

Answer:

See Discussion below

Discussion:

(sinq + cosq)^2 =                                     => (a +b)^2 = a^2 + 2ab + b^2

(sinq)^2 + (cosq)^2 + 2 sinq* cosq        => as (sinx)^2 + (cosx)^2 = 1

1 + 2 sinq*cosq              (*)


Setting a = b = q in the trig identity:

sin(a+b) = sina*cosb + cosa*sinb                      

sin(2q) =                      (**)

sinq*cosq + cosq*sinq      => as both terms are identical

2 sinq*cosq


Combining (*) and (**)

(sinq + cosq)^2 = 1 + 2sinq*cosq     => (**) 2sinq*cosq =  sqin(2q)

                          = 1 +  sin(2q)

Hence

(sinq + cosq)^2  = 1 +  sin(2q)            => subtracting 1 from both sides

(sinq + cosq)^2  - 1 =   sin(2q)  

The last statement is what we are trying to prove.



Thank you,

MrB

7 0
3 years ago
Add 4.136+29.95 and show all your work!<br><br> *please don't go on the internet and copy and paste*
jeyben [28]

Answer:

34.086

Step-by-step explanation:

calculator

7 0
2 years ago
Read 2 more answers
Sheila can pay her hotel bill in Euros (€) or Pounds (£).
algol [13]

Answer:

£365 is cheaper than  €425.

Step-by-step explanation:

We want to convert both prices to the same currency. It is easier to convert pounds to euros, as the exchange rate uses £1.

€425 or £365

£365 = €(365 * 1.14)

£365 = €416.10

€425 > €416.10

£365 is cheaper than  €425.

8 0
2 years ago
Please help with this im really confused and please explain abit with words. please and thanks!
Hatshy [7]

Step-by-step explanation:

just add all the given angles and equate it with 540° and then find x

x/2 + x/2 + x - 25 + 100 + x - 15 = 540°

3x + 60 = 540°

3x = 540 - 60

x = 480/3

x = 160°

on checking, the given shape values of x-25 and x - 15 are both still obtuse angles thus the answer is correct.

5 0
3 years ago
Can someone help me with this?
Kruka [31]

Answer:

the answer would be 34 i believe

Step-by-step explanation:

3 0
2 years ago
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