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
Temka [501]
3 years ago
6

Simplify the expression (2+5i)(-1+5i)

Mathematics
2 answers:
topjm [15]3 years ago
8 0
(2+5i)(5i-1)=(-2-25)+i(10-5)=-27+5i
kati45 [8]3 years ago
4 0
(2+5i)(-1+5i)=\\
-2+10i-5i-25=\\
-27+5i
You might be interested in
Pls help me no one helps me
Ahat [919]

Answer:

20% error

Step-by-step explanation:

easy

9.4/7.8 or do 0.078x=9.4

1.20512820513

round to nearest tenth

1.2

means

20% error

4 0
2 years ago
Which of the following expressions has 3 terms? <br> 8x + y - z <br> xyz <br> y3 + 1
Dmitry [639]
8x + y - z

You can tell because each term is separated by an operator such as +, -, *, or /
8 0
3 years ago
Read 2 more answers
susan surveys 20 people in her math class to find out the most popular movie. 5 students say star wars if the are 200 students i
Eva8 [605]
5 out of 20 like Star Wars so what value (x) should like Star Wars out of 200. Set up a proportion comparing the two.

x= # of people in 7th gr who like Star Wars

5/20= x/200
cross multiply

(5*200)= (20*x)
1000= 20x
divide both sides by 20

50= x


ANSWER: 50 people in the 7th grade should like Star Wars.

Hope this helps! :)
8 0
3 years ago
Read 2 more answers
What is the markup percent on a diamond for which the markup is $870 and the selling price is $2870?
ryzh [129]

Answer:

30.31%

Step-by-step explanation:

Mark up on selling price is given by markup*100%/selling price

In this case, markup is given as $870 while the selling price is $2870 hence the percentage of narkup to selling price will be given by \frac {870\times 100}{2870}=30.313588850174\approx 30.31

Therefore, the percentage of markup to selling price is approximately 30.31%

3 0
3 years ago
the function f(t) = 5 cos(pi/4*t) + 11 represents the tide in dark sea. it has a maximum of 16 feet when time (t) is 0 and a min
Allushta [10]

The height of the tide after eight hours is 16 feet.

<h3>How to illustrate the function?</h3>

From the information given, the function is given as 5cos (π/4)t + 11.

In this case, the time is given as eight hours. This will be:

f(8) = 5 × cos (π/4) × 8 + 11

f(8) = 5 × cos(2π) + 11

= (5 × 0.999) + 11

= 16 feet

The height is 16 feet.

Learn more about functions on:

brainly.com/question/5957029

#SPJ1

6 0
2 years ago
Other questions:
  • 10 times as much as 10 is
    13·2 answers
  • Which expression has the same value as the one below?
    8·2 answers
  • At midnight, the temperature was 15°C. Over the next six hours, the temperature dropped 3 degrees each hour. By noon, the temper
    10·1 answer
  • Express the fraction 1/8^3 using a negative exponent
    14·1 answer
  • 1 5/6 x 2 1/4 = <br> ANSWER ASAPPP . BE RIGHT AND EXPLAIN PLS
    5·2 answers
  • 3^38 - 3^37 =2/3^x <br> answer
    7·1 answer
  • If the standard deviation of a data set were originally 8, and if each value in
    13·1 answer
  • ***<br> Write the rule for the value of the term of the geometric sequence:<br> -5, 10, 20, 40, ..
    14·1 answer
  • I have having a problem with this equation 3(-2-3x) = -9x-4
    6·1 answer
  • Rewrite in radical form (-243)2/5
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!