1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dsp73
3 years ago
15

Simplify the expression (9 + 2i)(9 − 2i). 81 − 18i 81 + 18i 77 85

Mathematics
1 answer:
Ymorist [56]3 years ago
5 0

Answer:

=85

Step-by-step explanation:

I'm pretty sure I'm correct

You might be interested in
Anyone know the answer to this one ?
lys-0071 [83]

Answer:  B) y = 2 · 3ˣ

<u>Step-by-step explanation:</u>

We can see that (2, 18) is a point on the graph.

Plug it into the equations to see which one make a true statement.

        A) y = 1 · 3ˣ

            18 = 1 · 3²

            18 = 1 · 9

             18 ≠ 9

       B) y = 2 · 3ˣ

          18 = 2 · 3²

           18 = 2 · 9

           18 = 18             This works!

       C) y = 3 · 2ˣ

          18 = 3 · 2²

           18 = 3 · 4

           18 ≠ 12

       D) y = 4 · 3ˣ

          18 = 4 · 3²

           18 = 4 · 9

           18 ≠ 36

4 0
3 years ago
Find the measure of an angle whose measure is 20° less than the measure of its supplement.
Tasya [4]
Supplementary = angles add up to 180
Measure = 20 less

Labelled as x + (x - 20) = 180

Solve.

x + (x - 20) = 180
             2x = 200
             /2      /2
               x = 100

Angle 1:             Angle 2:
x - 20                  x
100 - 20             100
80

Therefore the angle is 80 degrees.

Proof: 80 + 100 = 180 (supplementary)
100 - 80 = 20 (80 is less than supplement (100)

Hope I helped :))))
3 0
3 years ago
The volume of a cylinder is 9080 in.³ the same height of the cylinder is 20 inches what is the radius of the cylinder express yo
insens350 [35]

Answer:

12.02 inches

Step-by-step explanation:

recall, volume of a cylinder is given by

V = πr²h

where r is the radius of the cylinder and h = the height

hence

9080 = π x r² x 20

r² = 9080 ÷ 20π = 144.513

r = √144.513 = 12.02 inches

7 0
3 years ago
Read 2 more answers
What is the area of the parallelogram shown above
adoni [48]

The area of the parallelogram is 55 square feet

<h3>How to determine the area of the parallelogram?</h3>

From the figure, we have the following dimensions:

Height = 5 ft

Base = 11 ft

The area of the parallelogram is calculated as:

Area = Base * Height

This gives

Area = 5ft * 11ft

Evaluate the product

Area = 55 square feet

Hence, the area of the parallelogram is 55 square feet

Read more about areas at:

brainly.com/question/76387

#SPJ1

8 0
2 years ago
3/5 - 3/5= ??? how do i do this problem i'm very confuse because i keep getting 1 1/5 but i know the answer is 0.5 or 0 but do u
Paul [167]

Answer:

-3.5+3.5=0

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • After Take Two began renting DVDs at their video store, business soared. Between 2005 and 2010, profits increased at an average
    13·1 answer
  • the lines below are perpendicular if the slope of the red line is undefined what is the slope of the green line
    11·1 answer
  • Michael goes to the fair with 3 friends. They each ride 4 rides at $4.25 per ride. Two of them buy cotton candy for $3.50 each.
    11·1 answer
  • A one-year membership to a health club costs $480. This includes a $150 fee for new members that are paid when joining. What wou
    10·2 answers
  • Trevor buys 80 shares of Upton Group and 70 shares of TJH Small-Cap. What is Trevor’s total investment? a. $2,687.90 b. $2,768.0
    12·1 answer
  • What is the slope of the line with equation <br>-3+6y=12
    15·2 answers
  • PLEASE HELP WILL MARK BRAINLIEST !!!!!!! 28 pts
    6·2 answers
  • Find the radius of the button. the button: 3.5 inches
    6·1 answer
  • A local parking garage charges $5 for the first hour and $1.25 for each additional hour. Write an equation in function notation
    13·1 answer
  • Loook below find the area
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!