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3 years ago

Please help... I don't understand this

Mathematics

1 answer:

vlada-n [284]3 years ago

6 0

We know that

<span>the rotation of a solid does not modify the values of the internal angles of the solid
</span>therefore
interior angle after 90° rotation=interior angle before 90° rotation
interior angle after 90° rotation=108°

the answer is the option D 108 °

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virginia painting service charges $10 per job and $0.20 per square foot. If Virginia earns $50 for one painting one job, how man

otez555 [7]

50=10+.2x so if you solve for x you get x=200. Hope this helps:)

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4 years ago

What is the sum of the geometric sequence 4, 16, 64, ... if there are 8 terms? (6 points)

PtichkaEL [24]

Answer:

87380

Step-by-step explanation:

The sum to n terms of a geometric sequence is

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r = $\frac{16}{4}$ = 4 and a = 4, hence

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3 years ago

Simplify -6i(8-6i)(-8-8i)

padilas [110]

Answer:

-96 + 672\,i

Step-by-step explanation:

This is a product of complex numbers, so we have in mind not only the general rules for multiplying binomials, but also the properties associated with the powers of the imaginary unit "i", in particular $i^2=-1$

We start by making the first product indicated which is that of a pure imaginary number (-6i) times the complex number (8-6i). We use distributive property and obtain the new complex number that results from this product:

$-6\,i\,(8-6\,i)= (-6\,i)\,* 8 \, -\,6\,i\,(-6\,i)=-48\,i+36\,i^2=-48\,i+36\,(-1)=-36-48\,i$

Now we make the second multiplication indicated (using distributive property as one does with the product of binomials), and combine like terms at the end:

$(-36-48\,i)\,(-8-8\.i)=(-36)\.(-8)+(-36)(-8\,i)+(-48\,i)\,(-8)+(-48\,i)(-8\,i)=\\=288+288\,i+384\,i+384\,i^2=288+288\,i+384\,i+384\,(-1)=\\=288-384+288\,i+384\,i=-96+672\,i$

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3 years ago

What is the surface area formula of a triangular prism?

torisob [31]

Step-by-step explanation:

Triangular prisms have their own formula for finding surface area because they have two triangular faces opposite to each other. The formula A=12bh is used fo find the area of the top and bases triangular faces, where A=area, b=base, and h = height.

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3 years ago

What is the value of the x in the equation? x+1/8=3/4

creativ13 [48]

Answer:

x = 5/8

Step-by-step explanation:

Isolate the variable by subtracting 1/8 from both sides:

3/4 - 1/8 = 5/8

Now, the equation is:

x = 5/8

Therefore, the answer is 5/8

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3 years ago

Read 2 more answers