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Kobotan [32]
3 years ago
6

What is the sum of 2 + 3i and −1+7i A 1 + 10i B 3−4i C 5 + 6i D 9 + 2i

Mathematics
2 answers:
poizon [28]3 years ago
6 0
A is the correct answer


2 + 3i + (-1) + 7i
1 + 10i
Angelina_Jolie [31]3 years ago
3 0
The correct answer is A, have a good day!
You might be interested in
Perform the indicated operation.<br> 6/8 - 3/8
Maru [420]

Answer:

3/8

Step-by-step explanation:

(3/8) Since they have the same denominator, you can subtract the second numerator from the first so 6 minus 3 is 3. So 3/8

3 0
3 years ago
1. In Tulsa, Oklahoma the sales tax is 7.9%. If
LenaWriter [7]

Answer:

$ 67.15 tax

Step-by-step explanation:

the tax would be 7.9% of 850

turn ur percent to a decimal....and " of " means multiply

0.079 * 850 = 67.15 <==

3 0
3 years ago
The length of a rectangle is 7 more than the width the area is 744 square centimeters find length and width of rectangle
andrezito [222]

Answer:

l=31\ cm\\\\w=24\ cm

Step-by-step explanation:

The formula that is used to calculate the area of a rectangle is:

A=lw

Where "l" is the lenght and "w" is the width.

You know that the area of that rectangle is:

A=744\ cm^2

And, according to the exercise, its lenght is 7 more than its width; then:

l=w+7

Then, you can make the corresponding substitution into the formula A=lw:

 744=(w+7)w

Simplify:

744=w^2+7w\\\\w^2+7w-744=0

Factor the equation. Find two numbers whose sum is 7 and whose product is -744. These are 31 and -24.

Then, you get:

(w-24)(w+31)=0\\\\w_1=24\\\\w_2=-31

The width of the rectangle is the positive value:

w=24\ cm

Then, the lenght is:

l=24+7\\\\l=31\ cm

8 0
3 years ago
Rylee saved $9 on a $60 pair of<br> shoes. What percent did she save?
Ilia_Sergeevich [38]

Answer:

15%

Step-by-step explanation:

9/60=3/20=15%

8 0
2 years ago
I don’t think I’m doing the top correctly. Could you help 7-10?
natta225 [31]

7

a trapezoid

equation for area = h(a +b) ÷ 2

so you sub that in

8(9 +21) ÷ 2 = 8 × 30 ÷ 2 = 120

so the area is 120cm

8

A trapezoid

equation for area = h(a +b) ÷ 2

so you sub that in

6(9 + 5 ) ÷ 2 = 6 × 14 ÷ 2 = 42

So the answer is 42 inches

9

A kite

equation for area = p× q ÷ 2

so you sub that in

(3+3)×(4.5+6.5) ÷ 2 = 6×11÷2 = 3

So the answer is 33 cm

sorry I can't see 10s measurements

8 0
3 years ago
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