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algol [13]
3 years ago
5

Please answer this for me asap?

Mathematics
1 answer:
tiny-mole [99]3 years ago
5 0

Answer:trapezoid 3 is the only right one

rectangle 1 and 2 are correct

parallelogram 3 is only correct

Step-by-step explanation:

sorry if i miss the first one

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Find x. Round your answer to the nearest tenth. <br><br> ______________
liubo4ka [24]

Answer:

Step-by-step expThis is the concept of trigonometry, the value of x will be calculated as follows;

sin theta=[opposite]/[hypotenuse]

theta=x

opposite=16 units

hypotenuse=21 units

thus;

sin x=16/21

hence;

x=arcsin(16/21)

x=49.63

x=50 (to the nearest degrees)

7 0
3 years ago
Verify the identity. <br><br>cot. (x - (pi/2)) = -tan x<br><br>Please, help me!!!
Leya [2.2K]

Answer:

cot . (x- π/2)= - tanx

Step-by-step explanation:

cot . (x- π/2)= - tanx

cot .x - cot π/2= - tanx

cot π/2= 1/tanπ/2

But tan π/2= ∞

cot π/2 = 1/∞= 0

cotx - 0= - tanx

cot x = - tanx

cosx/sinx= - sinx/cosx             Putting values of cot and tan

cosx/ sinx ( sinx/cos x) = -sinx/cos x  (sinx/cos x )  

Multiplying both sides with  sinx/cos x    

1= - sin²x/cos²x

cos²x= - sin²x                 as cosx = -sinx

5 0
3 years ago
Sara has 2/3 of a leftover chocolate pie. She wants to share the leftover pie with her friends. If she gives each friend 1/6 of
salantis [7]

Answer:

well assuming there's 6 friends, which you did not state, if you divided it into 6ths then everyone will get one piece

7 0
3 years ago
Read 2 more answers
Figure EFGH on the grid below represents a trapzoidal plate at its starting position.
marusya05 [52]
90 degree rotation (CCW):
(x,y) -> (-y,x)
3 0
3 years ago
Using completing the square to solve for x in the equation (x-12)(x+4)=9
Vladimir79 [104]
Hello!

You can multiply (x-12) and (x+4)

x * x = x^2
x * 4 = 4x
-12 * x = -12x
-12 * 4 = -48

Now we have

x^2 - 8x - 48 = 9

Subtract 9 from both sides

x^2 - 8x -57 = 0

Use the quadratic formula

This give use the answer of

x = 4 +\sqrt{72}

Hope this helps!
3 0
4 years ago
Read 2 more answers
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