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fgiga [73]
3 years ago
5

∠C and ​ ∠D ​ are vertical angles with m∠C=−2x+90 and m∠D=x−30 . What is m∠D ?

Mathematics
1 answer:
Leviafan [203]3 years ago
5 0
∠C = ∠ D (vertical angles

C= -2x + 90
D= x-30

Since C = D , Then -2x + 90 = x-30

-2x - x = - 30 - 90

-3x = -120

3x = 120 and x = 40°. Now replace x by 40 in any of the equality, say :
D = x-30 ; D = 40 - 30 and D = 10°

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Vadim26 [7]

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10.06 ft

Step-by-step explanation:

Maria's maximum height will occur when her velocity reaches zero (0). This means that she has stopped ascending and is about to begin descent.

The equation for the height reached by Maria on the trampoline is given as:

h=-16t^2+18t+5

To find her maximum height, we first have to find the time it will take her to get to that height and corresponding velocity (zero).

Her velocity can be found by differentiating her height i.e. dh/dt:

v = \frac{dh}{dt} = -32t + 18

Therefore, when v = 0:

0 = -32t+ 18\\\\=> 32t= 18\\\\t = 18 / 32 = 0.5625 secs

It takes her 0.5625 seconds to get to her maximum height.

Therefore, her height at that time (0.5625 seconds) is:

h=-16(0.5625)^2+18(0.5625)+5\\\\h = -16 * (0.3164) + 10.125+5\\\\h = -5.0624 + 15.125\\\\h = 10.06 ft

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3 years ago
Find the area of the shape shown below.
mina [271]

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Step-by-step explanation:

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balu736 [363]

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Step-by-step explanation:

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malfutka [58]

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7 0
3 years ago
Read 2 more answers
Please help me!! Also if you can show the steps, I’d appreciate it. Thank you very much
natita [175]
-3x=2x+19
-19 -19
-3x-19=2x
+3x +3x
-19=5x
/5 /5
x=19/5


3 0
3 years ago
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