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LuckyWell [14K]
3 years ago
7

Simplify 3i(4-7i) help quick!

Mathematics
1 answer:
Maslowich3 years ago
4 0

i=\sqrt{-1}\to i^2=-1\\\\\text{Use distributive property:}\\\\3i(4-7i)=(3i)(4)-(3i)(7i)=12i-21i^2=12i-21(-1)\\\\=12i+21=\boxed{21+12i}

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CAN SOMEONE PLZ HELP ME
yaroslaw [1]

Answer:

The expression for the total cost of the visit to dentist is T = 50 + 100n .

Step-by-step explanation:

As given

The price of a visit to the dentist is $50.

If the dentist fills any cavities, an additional charge of $100 per cavity gets added to the bill.

If the dentist n cavities .

Let us assume that the total cost of the visit to dentist be T.

Than the expression becomes

T = 50 + 100n

Therefore the expression for the total cost of the visit to dentist is T = 50 + 100n .

3 0
3 years ago
Use the Associative Property of Addition to write an expression equivalent to (n + 2) + 7. Which expression is equivalent to (n
insens350 [35]

Answer:

The correct answer is OB.

Step-by-step explanation:

Let us recall the Associative Property of Addition: given three real numbers a, b and c the following equality holds:

(a+b) + c = a+(b+c).

Let us remark that the Associative Property of Addition tells us that we can perform the sums in any order.  So,

(n+2)+7 = n+(2+7).

In the other options there was used the Commutative Property of Addition.

6 0
4 years ago
Burnwood Tech plans to issue some $50 par preferred stock with a 8% dividend. A similar stock is selling on the market for $65.
Vanyuwa [196]

Answer:

6.5%

Step-by-step explanation:

The formular used to calculate the cost of preferred stock is:

= Fixed dividend/Net proceeds

Fixed dividend= $50 × 8/100

= $50×0.08

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Net proceeds= Market price-Flotation costs

= $65-(6/100×$65)

= $65-(0.06×$65)

= $65-3.9

= $61.1

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= 0.065×100

= 6.5%

Hence the cost of preferred stock is 6.5%

8 0
3 years ago
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vovikov84 [41]

Answer:

26

Step-by-step explanation:

14+12=26

1+1=2

4+2=6

7 0
3 years ago
Read 2 more answers
What is the answer to 2 (x + 5) = 3x + 1
Dima020 [189]

Answer:

answer will 9 . hope it helps

4 0
3 years ago
Read 2 more answers
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