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3 years ago

What is the length of line segment BC, if the length of line segment DC is 15?

Mathematics

1 answer:

krek1111 [17]3 years ago

6 0

30 because the tick marks show the two segments are = so all you have to do is 15+15.

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I really need some help

motikmotik

It is -12,10 and your welcome for me helping you im only trying to get the point s

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2 years ago

An 8-sided die is formed when two square pyramids are attached by their bases. The perimeter of the base shape is 6 centimeters.

lawyer [7]

Answer:

7.5cm²

Complete question:What is the surface area of the 8-sided figure?

Step-by-step explanation:

Consider the half of the 8-sided die i.e the pyramid ABCDE:

As the base is 6 of the perimeter, so each side of the base is 6/4=3/2

Now, the distance between the tallest points is 2 cm, so the height of Pyramid ABCDE is 1 cm.

Considering the right triangle EOM:

EO=1, OM= 3/4 (it is half of AB=3/2) and EM is the hypothenuse, so by the pythagorean theorem length of EM is

$\sqrt{1+ ( \frac{3}{4} )^{2} }= \sqrt{1+ \frac{9}{16} }= \sqrt{ \frac{25}{16} }= \frac{5}{4} (cm)$

5. So side EBC has area

$\frac{1}{2}BC*EM= \frac{1}{2}* \frac{3}{2}* \frac{5}{4}= \frac{15}{16}$

6. The total area is 8*Area(EBC)= $8* \frac{15}{16}= \frac{15}{2}=7.5 ( cm^{2} )$

3 0

3 years ago

(7•8) + 1/2 (3•3)<br> 1/2(7•8)+1/2(3•3)<br> (7•8)+(3•3)<br> 1/2(7•8)+(3•3)

AfilCa [17]

Answer:4.5 for triangle + 56= 60.5 squuare units

Step-by-step explanation:

8 0

2 years ago

All currently has $25. He is going to start saving $5 every week

sergij07 [2.7K]

Answer:

I believe the answer is b

Step-by-step explanation: I think the answer is b because he gets $5 every week and he already has $25 the only thing we dont know is the weeks and you multiply 5 by the weeks so, 5(how much he gets each week) times x (The amount of weeks) plus 25(the amount he already has) equals y(the amount of everything put together)

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3 years ago

Which of the following will result in a rational answer?

Brrunno [24]

I think the answer is d

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3 years ago