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Vlad1618 [11]
3 years ago
11

I need help with exercises 3,4, and 6 please show all work and don’t answer number 5 just tell me if it is correct

Mathematics
1 answer:
joja [24]3 years ago
8 0
*If you need me to do #5, DM me!

3. 
The area of a triangle can be given by (just plug and chug as always):
A_t = \frac{1}{2} bh = \frac{1}{2}(3)(4) = 6ft^2
The area of the triangle is 6ft².

4. I will divide into a triangle and a rectangle (because the actual equation for the area of a pentagon requires it to be a perfect pentagon). Let's do the triangle first (height is 3 because you subtract 12 from 15):
A_t = \frac{1}{2} bh = \frac{1}{2}(8)(3) = 12m^2
A_r = bh = 12(8) = 96m^2
Now we just add them:
96+12 = 108m^2

So, the area of that pentagon is 108m².

5. You are actually wrong on this one because the area of a triangle is:
A_t = \frac{1}{2}bh
So, just halve your answer and it will be correct.

6. We can just split it into 4 triangles of equal area and then multiply the area of 1 triangle by 4 to get the total area. Let's do just that:
A_t = \frac{1}{2}bh = \frac{1}{2}(2.5)(5) = 6.25cm^2
Multiply by 4 to get total area:
6.25*4 = 25cm^2

So, the area of the given rhombus is 25cm².
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Pls help!!!
natka813 [3]

Answer:

The area of the base B is equal to 770\ cm^{2}

The volume  is equal to 10,087\ cm^{3}

Step-by-step explanation:

I will proceed to resolve the problem indicated in the attached figure.

The figure shown a inverted rectangular pyramid

The base is a rectangle

The area of the base B is equal to

B=(35)(22)=770\ cm^{2}

To find how many cubic centimeters of titanium are needed to manufacture one tip, calculate the volume of the figure

<em>Find the volume of the inverted rectangular pyramid</em>

The volume of the pyramid is equal to

V=\frac{1}{3}BH

we have

B=770\ cm^{2}

H=39.3\ cm

substitute

V=\frac{1}{3}(770)(39.3)=10,087\ cm^{3}

5 0
3 years ago
Alexis wrote 28 - 8 = 20. Then she
docker41 [41]

Answer:

no this is because 28-8+9=29 and 20-9=11

Step-by-step explanation:

8 0
2 years ago
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Which is equivalent to RootIndex 5 StartRoot 1,215 EndRoot Superscript x?
SOVA2 [1]

Answer:

1,215 Superscript one-fifth x

Step-by-step explanation:

Given:

The expression to simplify is given as:

(\sqrt[5]{1215})^x

We know that,

\sqrt[n]{a} = a^{\frac{1}{n}}

Here, n=5, a=1215

So, \sqrt[5]{1215} = 1215^{\frac{1}{5}}

So, the above expression becomes:

(\sqrt[5]{1215})^x = (1215^{\frac{1}{5}})^x

Now, using the law of indices (a^m)^n=a^{(m\times n)}

Here, a=1215,m=\frac{1}{5},n=x

So, the expression is finally simplified to;

=(1215)^{({\frac{1}{5}}\times x)}\\\\=(1215)^{\frac{1}{5}x}

Therefore, the second option is the correct one.

(\sqrt[5]{1215})^x = 1,215 Superscript one-fifth x

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3 years ago
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We know, 1 lbs = 0.45 Kg

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If Carl was born in January 1931 how old is he now?
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Answer:

Step-by-step explanation:

He would be 87 years old right now

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