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Vitek1552 [10]
3 years ago
7

Hello, could someone answer this question for me please? simplify (1 + i) + (-2 + i).

Mathematics
1 answer:
Debora [2.8K]3 years ago
6 0

Answer:

- 1 + 2i

Step-by-step explanation:

Given

(1 + i) + (- 2 + i) ← remove parenthesis

= 1 + i - 2 + i ← collect like terms

= - 1 + 2i

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If f (x) = 3x²-7 , find f(4)
vitfil [10]
Hello, 
To solve this function for f(4) we need to plug 4 into f(x) and the result will be our answer. We know that f(x) is 3x^2-7. Plugging in 4 we get 3(4)^2-7=41. Therefore, f(4)=41. Hope this helps!
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3 years ago
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Write and solve an equation to find the unknown side length x (in inches).
Gekata [30.6K]

The value of side length x is equal 6.05 in

<h3>Perimeter of a Square</h3>

The perimeter of a square is given as the sum of the total sides in the square or 4 multiplied by the side length of the square since they all have equal sides.

Mathematically, this can be written as

P = 4 *L\\P = 4l\\

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In this given question, the side length is equal to x and the perimeter of the square is given as 24.2in.

Let's substitute the values

P = 4L\\24.2 = 4L\\but l = x\\24.2 = 4x\\x = 6.05in

The side length of the square is equal to 6.05in

Learn more on perimeter of square here;

brainly.com/question/24487155

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complete question

Write and solve an equation to find the unknown side length x (in inches).

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8 0
1 year ago
Write an equation in the line in slope intercept form
Sergio039 [100]

Answer:

Y=2x-1

Step-by-step explanation:

In order to find the slope, its rise over run. So you would move from (0,-1) to the next point it intercepts, (1,1) and find it from there

As for the Y-Intercept, it would just be wherever the line connects with the Y axis, which happens to be (0,-1) or Negative 1.

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3 years ago
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SVETLANKA909090 [29]
14% of 82
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allochka39001 [22]

Answer:

C. Centroid

Step-by-step explanation:

The circumcenter is the center of a triangle's circumcircle (circumscribed circle over triangle). It can be found as the intersection of the perpendicular bisectors.

The incenter is the center of the incircle (inscribed circle into a triangle) of a triangle. The incenter can be constructed as the intersection of angle bisectors.

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The intersection of the three altitudes of a triangle is called the orthocenter.

Since three medians intersect at point which divides each median into 2:1 ratio, the answer is centroid.

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