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
schepotkina [342]
3 years ago
12

(7i)(7i)help! please show steps​

Mathematics
1 answer:
exis [7]3 years ago
7 0

Answer:

-49

Step-by-step explanation:

multiply 7 with 7 then i with i and lastly multiply the result numbers

7i × 7i ➡ 7 × 7 = 49

i × i = i^2

49 × i^2 = 49i^2

i^2 = -1 ➡ 49 × (-1) = -49

You might be interested in
Please I really need help on this!<br>​
Svetradugi [14.3K]

Step-by-step explanation:

output is 3 times of input so it's like this x ➡ 3x

4 0
2 years ago
it takes 63 minutes for four people to paint nine walls how many minutes does it take seven people to paint four walls?
joja [24]

Answer:

16 minutes

Step-by-step explanation:

If it takes 63 minutes to paint 9 walls then it means for every wall, it takes 63/9=7 minutes

Since it is 4 people working for 7 mins, the individual rate is 4/7 minutes per person

When we have 7 people, then the number minutes they take will be 7*4/7=4 minutes per wall

4 min per wall for 4 walls then total time will be 4*4=16 minutes

3 0
2 years ago
What is the cosine for a angle of 15 degrees?
elena-14-01-66 [18.8K]

Answer:

0.965925826 = 0.97

Step-by-step explanation:

just put in the calculator >>> cos(15)

6 0
3 years ago
You have 10 fewer quarters than dimes and 5 fewer nickels than quarters. the total value of the coins is $4.75. Set up a system
Yanka [14]
So 
x- quarters
y - dimes
z- nickels

The system of equations would be
x+10=y
z+5=x
x+y+z= 4.75
6 0
3 years ago
Jay had 6 times as much money as Kay. Then Jay gave Kay $33. Jay now has twice as much money as Kay. How much did they each star
timofeeve [1]

Answer:

Jay started with $148.5 and Kay with $24.75.

Step-by-step explanation:

With the information provided you know that Jay had 6 times as much money as Kay wich can be expressed as:

J=6K, where

J is the money Jay had

K is the money Kay had

Also, you know that  Jay gave Kay $33 and Jay now has twice as much money as Kay, which would be:

J-33=2(K+33)

Now, you can replace J=6K in this equation and solve for K:

6K-33=2K+66

6K-2K=66+33

4K=66

K=24.75

Then, you can replace the value of K in J=6K:

J=6*24.75

J=148.5

According to this, the answer is that Jay started with $148.5 and Kay with $24.75.

7 0
2 years ago
Other questions:
  • One cell phone company offers a plan that costs $26.99 and includes unlimited night and weekend minutes. Another company offers
    12·1 answer
  • Which of these tables represents a linear function
    11·2 answers
  • John has a bag of marbles that contains 12 red marble,20 green marbles,and 17 blue marbles. If john pulls one marble out of the
    14·1 answer
  • What is the equation of the line in slope-intercept form?<br><br> y = _ x+_=
    7·1 answer
  • When cubing a number, you have to...
    5·2 answers
  • What is the end behavior of f(x) =log3 (x+7) -1?
    10·1 answer
  • the cell phone bill recorded that Jeremiah sent 532 text messages last week. On average how many text messages did he send each
    8·2 answers
  • Hey guys I really need your help on this so basically there’s this guy at school he’s new his name is Drake and he’s the sweetes
    9·2 answers
  • An electrician completes 1/6 of a job in 2/3 hour. at this rate, how long does it take the electrician to complete the job?
    6·2 answers
  • 11 3/8 + 2 1/2<br><br><br> pleaseee help its missing
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!