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cestrela7 [59]
4 years ago
6

How do I solve this complex expression- (5+2i)+(6i^2-3i+2)

Mathematics
1 answer:
Anettt [7]4 years ago
6 0

Answer:

1-i

Step-by-step explanation:

Hello,

you know that i^2=-1, right?

so

(5+2i)+(6i^2-3i+2)\\\\=5+2i-6-3i+2\\ \\=1-i

Thanks

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Question 1-3........
Xelga [282]

1. Answer:

C. 1050

Step-by-step explanation:

To find the area of a rectangle, it is length * width * height

25 * 7 = 175

175 * 6 = 1050

2. Answer:

C. 8

Step-by-step explanation:

To find the missing dimension of a rectangle, you can easily just divide the total by each dimension

540 divided by 7.5 = 72

72 divided by 9 = 8

3. Answer:

D. 31,400

(31,415.9)

Step-by-step explanation:

The radius of the cylinder is 20

The height of the cylinder 25

πr2h is the formula used to find the volume of a cylinder

3 0
3 years ago
Thomas bought his whole family hot dogs and popcorn at the baseball game. He bought 60 items. He bought 3 hot dogs and and 8 pop
irina [24]

Answer:you mean $60 worth of items?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Write a linear equation that represents the cost of buying T-shirts from Paula’s Printing. Identify the meaning of each variable
vivado [14]

Answer:

y=21.50x

Step-by-step explanation:

Let

x ----> the number of t-shirts

y ----> the cost of buying T-shirts from Paula’s Printing in dollars

take two points from the given data

we have

(2,43) and (4,86)

step 1

Find the slope

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute the values in the formula

m=\frac{86-43}{4-2}

m=\frac{43}{2}=\$21.50\ per\ t-shirt

step 2

Find the equation of the line in point slope form

y-y1=m(x-x1)

we have

m=21.50

(x1,y1)=(2,43)

substitute

y-43=21.50(x-2)

step 3

Convert to slope intercept form

y=mx+b

Isolate the variable y

y-43=21.50x-43

y=21.50x-43+43

y=21.50x

This linear equation represent a proportional relationship (the line passes through the origin)

3 0
4 years ago
Which is the constant of proportionality for the data in the table?
Lisa [10]

Answer:

C) 6

Step-by-step explanation:

From the given data we can find the constant of proportionality by dividing The number of people by number of cars.

Constant of proportionality = \frac{\textrm{Number of people}}{\textrm{Number of cars}}

Taking any point from the table will give the same constant of proportionality as they are proportional quantities.

Constant of proportionality = \frac{18}{3}=\frac{30}{5}=\frac{36}{6}=\frac{48}{8}=6

This can be written as 6 people per car.

For 10 cars, number of people will be =10\times 6=60 people.

5 0
3 years ago
The half-life of aspirin is about 3 hours. If someone takes 700mg, how long will it take until less than 50mg is left in that pe
uranmaximum [27]
In 3 hours half of 700 would be 700/2=350

in 3 more hours, so 6 total, the half life would be 350/2 = 175

in 3 more hours, 9 total, the half life would be 175/2 = 87.5

in 3 more hours, 12 total, the live life would be 87.5 / 2 = 43.75

 so it would be 12 hours to have less than 50 mg

5 0
3 years ago
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