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2 years ago

answers please! i’m in need of answers! i really need to get a good grade on this so i can get a better grade for my math test!

Mathematics

2 answers:

elena-14-01-66 [18.8K]2 years ago

5 0

4:

V= L x W x H
V= 8.2ft x 9.4ft x 10.7 ft
V= 824. 756 ft3 or 824.8ft3

The volume of the cube is 824.8 ft3. The answer is F.

Mrrafil [7]2 years ago

3 0

3- B
4- F
5- B
6- G

4(1/3) x 3 = 13
13 / 2 = 6.5
6.5 x 6(2/3) = 43.3

8.2 x 9.4 = 77.08
77.08 x 10.7 = 824.8

5 x 9 = 45
45 x 2 = 90
5 x 8 = 40
40 x 2 = 80
9 x 8 = 72
72 x 2 = 144
144 + 80 + 90 = 314

5 x 4 = 20
12 x 4 = 48
13 x 4 = 52
12 x 5 = 60
60 / 2 = 30
20 + 48 + 52 + 30 + 30 = 180

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3 years ago

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The extensions of the legs AB and CD of a trapezoid ABCD intersect at point E. Find the lengths of the sides of △AED if AB=5cm,

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AE = 15 cm; ED = 18 cm; AD = 15 cm (given)

Step-by-step explanation:

ΔBEC ~ ΔAED so ...

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Substituting given numbers (lengths in centimeters), we have ...

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3 years ago

Find 2 common angles that sum to (17pi/12) 2. Evaluate tan(17pi/12) using the sum identity for tangent.

Dmitry [639]

Note that
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Note that
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Use the identity
$tan(x+y)= \frac{tan(x)+tan(y)}{1-tan(x)tan(y)}$

Therefore
$tan( \frac{17 \pi }{12} )= \frac{1+ \frac{1}{ \sqrt{3} } }{1- \frac{1}{ \sqrt{3} } } = \frac{ \sqrt{3}+1 }{ \sqrt{3}-1} = \frac{( \sqrt{3}+1 )^{2}}{( \sqrt{3}-1 )( \sqrt{3}+1 )} = \frac{3+1+2 \sqrt{3}}{3-1} =2+ \sqrt{3}$

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3 years ago