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2 years ago

Help please with explanation

Mathematics

2 answers:

quester [9]2 years ago

7 0

Answer:

A = 104 m²

Step-by-step explanation:

The figure is composed of a rectangle and a triangle

area of rectangle = 10 × 8 = 80 m²

area of triangle = $\frac{1}{2}$ bh ( b is base and h the perpendicular height )

Here b = 8 and h = 6 , then

area = $\frac{1}{2}$ × 8 × 6 = 4 × 6 = 24 m²

Then

A = 80 + 24 = 104 m²

NeX [460]2 years ago

4 0

Answer:

what do you want to find in the first place?

Step-by-step explanation:

your are not telling us what you want us to explain its like if I showed you a candy and then I told you explain. Explain what? how the candy is made? what type of candy it is? how it tastes? it's size? it's color? you have to be more precise

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Answer:

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Step-by-step explanation:

Formula for area:

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nydimaria [60]

Answer with Step-by-step explanation:

We are given that

F=<0,-8>=0i-8j=-8j

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The component of force is divided into two direction

1.Along the plane

2.Perpendicular to the plane

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Force along the plane will be= $\mid F_x\mid=F\cdot r$

Force along the plane will be = $\mid F_x\mid=F\cdot (\frac{1}{2}i-\frac{\sqrt 3}{2}j)=-8j\cdot(\frac{1}{2}i-\frac{\sqrt 3}{2}j)=8\times \frac{\sqrt 3}{2}=4\sqrt 3$ N

By using $i\cdot i=j\cdoty j=k\cdot k=1,i\cdot j=j\cdot k=k\cdot i=j\cdot i=k\cdot j=i\cdot k=0$

Therefore, force along the plane= $\mid F_x\mid(\frac{1}{2}i-\frac{\sqrt 3}{2}j)=4\sqrt 3(\frac{1}{2}i-\frac{\sqrt 3}{2}j)$

2.The vector perpendicular to the plane= $r=-sin\frac{\pi}{3}-cos\frac{\pi}{3}=-\frac{\sqrt 3}{2}i-\frac{1}{2}j$

The force perpendicular to the plane= $\mid F_y\mid=F\cdot r=-8j(-\frac{\sqrt 3}{2}i-\frac{1}{2}j)$

The force perpendicular to the plane= $4$ N

Therefore, $F_y=4(-\frac{\sqrt 3}{2}i-\frac{1}{2}j)$

Sum of two component of force= $F_x+F_y=4\sqrt 3(\frac{1}{2}i-\frac{\sqrt 3}{2}j)+4(-\frac{\sqrt 3}{2}i-\frac{1}{2}j)$

Sum of two component of force= $2\sqrt 3i-6j-2\sqrt3 i-2j=-8j$

Hence,sum of two component of forces=Total force.

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3 years ago

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3 years ago

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liraira [26]

Answer:

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Step-by-step explanation:

Let the speed of sound = x meter per second.

It is given that,

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So, we get,

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7 0

3 years ago

Help please with explanation​

Help please with explanation