3 years ago

Add or subtract as indicated and write the result in standard form 3i+(-6-i)

Mathematics

1 answer:

yKpoI14uk [10]3 years ago

5 0

Answer:

B: -6+2i

Step-by-step explanation:

3i + (-6 - i) = ⇒ open parenthesis
3i - 6 - i = ⇒ simplify
-6 + 2i ⇒ answer in standard form of a+bi

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a cylinder with base are 169π ft^2 and a height twice the radius. what is the lateral area and surface area of the cylinder

Morgarella [4.7K]

$Area\ of\ base:A_B=169\pi\ ft^2\\\\A_B=\pi r^2\ \ \ (r-radius)\\\\\pi r^2=169\pi\ \ \ /:\pi\\\\r^2=169\\\\r=\sqrt{169}\\\\r=13\ (ft)\\\\H=2r\to H=2\cdot13=26\ (ft)$

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lateral\ area:A_L=2\pi rH\\\\A_L=2\pi\cdot13\cdot26=676\pi\ (ft^2)\\\\Surface\ area:A_S=2A_B+A_L\\\\A_S=2\cdot169\pi+676\pi=338\pi+676\pi=1014\pi\ (ft^2)$

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2 years ago

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Fed [463]

Answer:

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Step-by-step explanation:

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2 years ago

If MN = x+4 and DE = 3x-2, find x. (More info in pic)

algol [13]

Answer: D) 10

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Explanation:

I'm assuming points M and N are midpoints of segments FD and FE respectively. If that's the case, then segment DE is twice as long compared to segment MN. We consider MN to be a midsegment.

So,

DE = 2*(MN)

3x-2 = 2*(x+4)

3x-2 = 2x+8

3x-2x = 8+2

x = 10

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2 years ago

Drag each length to match it to an equivalent length. 2 yards 5 inches returned to choices list. 2 feet 8 inches4 yards9 feet2 y

Grace [21]

Answer:

2 yards 5 inches will be equivalent to 77 inches

Step-by-step explanation:

Given length -

2 yards 5 inches

One yard has 36 inches

Two yards will have 2*36 = 72 inches

Thus, 2 yards 5 inches will sum up to 72 inches + 5 inches = 77 inches

Hence, 2 yards 5 inches will be equivalent to 77 inches

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2 years ago

What is x/5+7=16 gonna be?

Margarita [4]

x=45

Step-by-step explanation:

x/5+7-7=16-7

5/1×x/5=9×5/1

x=45

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2 years ago