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3 years ago

I need help in this problem.

Mathematics

2 answers:

adelina 88 [10]3 years ago

8 0

2 (4+1) + 3(4-3)= 10+3=13

agasfer [191]3 years ago

3 0

8+1 +12-3
9+9
The answer should be 18

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Simplify the expression to a + bi form:<br> (2 – i) – (-4+8i)

Ne4ueva [31]

Answer:

6-9i

Step-by-step explanation:

(2-i)-(-4+8i)

2-i+4-8i

2+4-i-8i

6-i-8i

6-9i

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8 0

3 years ago

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How do I solve x in a triangle

Sindrei [870]

All three sides always add up to 360 so add the given measures and subtract it from 360 and that would give you your answer.

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Compute the permutations and combinations. 4 P 4<br> A) 1<br> B) 4<br> C) 24

Elenna [48]

I belive the answer would be B if not im sorry

4 0

4 years ago

Please help!!!!!!!!!!

Gnoma [55]

Answer:

The surface of the prism is 84m²

Step-by-step explanation:

You have 4 figures here (two the same triangles)

you need to determine the surface of each and then sum it to one. This will be your final surface.

rectangles:

3*6= 18m²

5*6 = 30m²

4*6 = 24m²

triangles:

You need to determine the square of the triangles from the Heron's formula.

Heron's formula states that the area of a triangle whose sides have lengths a, b, and c is

$S=\sqrt{s(s-a)(s-b(s-c)}$ ,

where s is the semi-perimeter of the triangle; that is,

$s=\frac{a+b+c}{2}$ .

So the permimeter of the triangle is

2p=4+5+3 = 12m

p = 6m

$S = \sqrt{p*(p-a)*(p-b)*(p-c)} = \sqrt{6*(6-3)*(6-4)*(6-5)} = \sqrt{6*3*2*1} =\sqrt{36} =6[m^{2} ]$

So the surface of the prism is a total sum of all surfaces:

P = 18m²+30m²+ 24m²+2*6m² = 84m²

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3 years ago

With a real machine, why is W out always smaller than W in

bonufazy [111]

Is there any choices?

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3 years ago