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jok3333 [9.3K]
3 years ago
14

A commemorative plaque is the shape of a trapezoid with a height of 8 inches and bases that measure 12 inches and 15 inches. Wha

t is the area of the plaque. (1/2 (b1 + b2) x h )
Mathematics
1 answer:
aleksandrvk [35]3 years ago
4 0
27, hope this helps dude
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a ball is thrown straight up from the top of a 128 foot tall building with an initial speed of 32 feet per second. the height of
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Factoring, you have
  h(t) = -16(t^2 -2 -8) = -16(t -4)(t +2)

The ball hits the ground when h(t) = 0, so
  0 = -16(t -4)(t +2)
  t = 4 or -2

The positive solution is the one of interest.
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I need help now I don't get this
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The answer is $1.80.  You would take 25% of 3, which is 75, and subtract it from 3.  That leaves you with $2.25, which you take 20% off, which is 0.45, and subtract that from 2.25.  That leaves you with a grand total of $1.80.  Hope that this helped!
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3 years ago
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Find the measure of the are or central angle indicated. Assume that lines which appear to be
Alina [70]

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Answer:

  ?° = 153°

Step-by-step explanation:

The measure of an arc is the same as the measure of the central angle it subtends. The arc is marked 153°. The central angle (?°) has that same measure.

  ?° = 153°

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3 years ago
قالت تبيلة: هذه صديقتي، ... رينا، هي طالبة جديدة أيضا.​
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I dont really know how to do soh cah toah. please help me find x.
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First notice that the triangle with sides x,y,a and the triangle with sides z,a+b,x are similar. This is true because the angle between sides x,y in the smaller triangle is clearly 30^\circ, while the angle between sides y,z in the larger triangle is clearly 60^\circ. So the triangles are similar with sides x,y,a corresponding to a+b,z,x, respectively.

Now both triangles are 30^\circ-60^\circ-90^\circ, which means there's a convenient ratio between its sides. If the length of the shortest leg is \ell_1, then the length of the longer leg is \ell_2=\sqrt3\ell_1 and the hypotenuse has length \ell_3=\sqrt{{\ell_1}^2+{\ell_2}^2}=2\ell_1.

Since x is the shortest leg in the larger triangle, it follows that a+b=2x, so a+b=15=2x\implies x=\dfrac{15}2
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