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Paha777 [63]
3 years ago
8

Simplify (3-4i)(5+2i)

Mathematics
1 answer:
Andre45 [30]3 years ago
6 0
Foil
15+6i-20i-8i^2
-8i^2=8
15+8+6i-20i
23-14i
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Factor 7x^2-22x+3. <br><br> I really need help with this. please
sergij07 [2.7K]

Answer:

(7x-1)*(x-3)

7x^2−22x+3

break expression in groups:

(7x^2-x)+(-21x+3)

factor out "x" from (7x^2-x)

x(7x-1)

factor out -3 from (-21x+3)

-3(7x-1)

x(7x-1)-3(7x-1)

factor out the common terms <em>7x-1</em>

(7x-1)(x-3)

Answer:

(7x−1)(x−3)

Hope this helps!

4 0
3 years ago
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An electrical heating element produces heat depending on the resistance of the element and the current passed through it. The he
vredina [299]
The heat produced by current I is
H = I²R
where
R =  resistance.
According to the formula, heat produced is proportional to the square of the current.

When a current of I = 2 amps is applied, the heat produced is 
H = 10x³ + 80.
This heat includes heat due to a fixed current of 2 amps, and heat due to a variable current of x amps.

Because the heat produced is proportional to the square of the current, write the expressions as
H = (10x)*(x²) + 20*(2²)

The second term on the right is heat due to the fixed current of 2 amps, written as
20*(2²).
Therefore the fixed resistance is R = 20 ohms, and the square of the fixed current is 2².

The first term represents heat due to variable resistance, written as
(10x)*(x²).
Therefore the variable resistance is 10x, and the square of the variable current is x².

Answer:
The variable current is  10x.
6 0
3 years ago
Can someone Evaluate 2(4-1)^2
SIZIF [17.4K]

Answer:

The answer is 36

Step-by-step explanation:

First solve in parenthesis; 4-1=3

Then multiply that by the 2 to get 6

Then raise that value by the square root of 6^2 = 36

5 0
3 years ago
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a town's population is currently 5,500.if the population doubles every 91 years, what will the population be 182 years from now​
Blizzard [7]

Answer:

I think the answer is 22,000

7 0
3 years ago
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You have budgeted $4,800 for a company to complete guest satisfaction surveys for you. They charge $1,800 + $6 per respondent. H
Sophie [7]

Answer:

6

Step-by-step explanation:

7 0
3 years ago
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