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Makovka662 [10]
3 years ago
14

When you multiply (3+6i)(3+7i) you get an answer of the form a+bi. Find a.

Mathematics
1 answer:
stiks02 [169]3 years ago
5 0

(3 + 6i)(3 + 7i)

FOIL: First, Outside, Inside, and Last

3 x 3 = 9

3 x 7i = 21i

6i x 3 = 18i

6i x 71= 42i

9 + 21I + 18I + 42I = 9 + 81I

a = 9

B = 81I

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GuDViN [60]
We are given that Addison wants to cut 21 centimeters of lace. The question asks us to convert 24 centimeters into millimeters. However, to do that, we need to know how many millimeters are in a centimeter. There are 10 millimeters in a centimeter. Since centimeters are larger, we will need to multiply. Therefore, 21 × 10 is 210 millimeters, and that is how many millimeters Addison wanted to cut. Hope this helped and have a phenomenal day!
3 0
3 years ago
Alan works 6miles away from the apartment and rollerblades from his work place to the apartment at a constant rate of 7miles per
dimulka [17.4K]
Let the distance remaining after time t be x miles.

Distance traveled by Alan = (6-x) miles
Distance traveled by Soren = (8-x) miles

Time takes by the two is the same. Therefore,
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4 0
3 years ago
Read 2 more answers
Identify the following equation as that of a line, a circle, an ellipse, a parabola, or a hyperbola 3y 2 - x = 0
Olegator [25]

Answer:

It's a parabola

Step-by-step explanation:

If you write the equation as  

x  =3y2

, you can see that you are in the form  

f (y)=3y2

. This is a quadratic polynomial in  

y

, which means that it represents a parabola with axis parallel to the  

x  axis.

8 0
3 years ago
Eight two-person teams are participating in a three-legged race. Find the number of orders in which all 8 teams can finish the r
Wewaii [24]
Each team needs two people for a 3-legged race.
Therefore, the number of orders (combinations) of 2 people at a time from 8 is
₈C₂ = 8!/(2!6!)
      = (8*7*6!)/(2*6!)
      = (8*7)/2
      = 56/2
      = 28

Answer: 28
8 0
3 years ago
Which expression represents the sum (3z−11)+(6−6z) ?
Fudgin [204]

Answer: z = -5/-3

Step-by-step explanation:

(3z−11)+(6−6z)

3z - 11 + 6 - 6z

- 6z + 3z - 11 + 6

- 3z - 5

z = -5/-3

6 0
3 years ago
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