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trasher [3.6K]
3 years ago
10

Simplify the expression: (3 − 7i)(2 − 5i).

Mathematics
1 answer:
Mandarinka [93]3 years ago
3 0

Answer:

B

Step-by-step explanation:

3x2-3x5i-7ix2x7ix(-5i)

6-15i-14i+35i^2

6-15i-14i+35x(-1)

6-15i-14i-35

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Use substitution to solve the system of equations.
kakasveta [241]

Answer:

C (let me know if I am wrong!)

Step-by-step explanation:

We need to solve the equation.

If 5x+y = -24, then -24 - 5x = y.

x+ 3(-24-5x) = -2

= -14x-72=-2

= -14x-72+72=-2+72

= -14x=70

= -5

If x = -5, then -5 + 3y = -2.

3y = -2+5

3y = 3

y=1

So the answer is C.

4 0
3 years ago
What is 3x4 please tell me
Alinara [238K]
12 because if u had 3 groups of 4 that would be 3+3+3+3
8 0
3 years ago
Read 2 more answers
The population p (in millions) of Italy from 1990 through 2008 can be approximated by the model p=56.8e^o.oo15t , where t repres
dimulka [17.4K]

As we already have the model that describes the change of the population in Italy in terms of the years that have elapsed, we only have to replace the conditions that are requested in that equation.

Therefore to find the population of Italy in the year 2000 (t = 10 years)  substitute t = 10 in the equation and have:

p = 56.8e^{0.0015*10}\\

p=57.6584 million people

To find the population of Italy in 2008 (t = 18 years)

substitute t = 18 in the equation and have:

p=56.8e ^{0.0015*18}\\

p=58.3545 million people


To predict the population in Italy for 2015 and 2020 with this model, we substitute in the equation t = 25 and t = 30

t = 25

p=56.8e^{0.0015*25}

p=58.9704 million people


 t = 30

p=56.8e^{0.0015*30}

p=59.4144 million people

8 0
3 years ago
Determine the intercepts of the line. <br><br> Y-intercept (___,___)<br> X-intercept (___,___)
fenix001 [56]

Answer:

(-10,0) is the X intercept

(0,-45) is the Y intercept

Step-by-step explanation:

The x intercept is where it meets on the x axis, the y intercept is where it intercepts on the y axis

7 0
3 years ago
A kangaroo hops 2 kiliometers in 3 minutes. At this rate: How far does the kangaroo travel in 6 minutes?
Bess [88]

Answer:

4km

Step-by-step explanation:

4 0
3 years ago
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