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
mamaluj [8]
3 years ago
13

Rationalize the denominator of (click photo)

Mathematics
1 answer:
Ede4ka [16]3 years ago
6 0
\frac{\sqrt{-49}}{(7-2i)-(4+9i)}=\\
\frac{\sqrt{-1*7*7}}{3-11i}=\\
\frac{7i}{3-11i}*\frac{3+11i}{3+11i}=\\
\frac{(7i)*(3+11i)}{3^2-(11i)^2}=\\
\frac{21i+77i^2}{9+121}=\\
\frac{21i-77}{130}=\\
\frac{-77+21i}{130}

so it is the last option
You might be interested in
If G is a 3 x 4 matrix and His a 4x 3 matrix, what is the dimension of GH?
Neko [114]

Answer:

3x3

Step-by-step explanation:

G is a 3 x 4 matrix and His a 4x 3 matrix

In multiplication of matrix a particular formula is used

If G = MN and H = NM then GH = MM

So G= 3x4 and H = 4x3

Then GH = 3x3

The above rule is a rule that binds matrix multiplication and allows for an easier calculations and also helps check the possibility of the multiplication.

As for the above, the multiplication is possible an the result of the multiplication will give us a 3x3 matrix

6 0
3 years ago
Factor the expression using the GCF. 6x + 42
Nesterboy [21]

Answer: 6x + 42 +=78

.

Step-by-step explanation:

8 0
2 years ago
Renee is participating in a fundraiser based on how far she walks around the square field at her elementary school. The field is
RUDIKE [14]

Answer:

whooooooooooooooooooooooooooooooooooooooooo

Step-by-step explanation:

5 0
3 years ago
A pole that is 3.5m tall casts a shadow that is 1.7m long. At the same time, a nearby building casts a shadow that is 36.5m long
GalinKa [24]
1.)Convert into Proportion: 3.5/1.7=x/36.5
2.)Cross Multiply: 1.7x=127.75
3.)Simplify and Solve: x=75.14

x=75.14m tall
5 0
3 years ago
Why must fire extinguishers be routinely maintained?
eduard

Answer: the answer would be To make sure they remain effective.

Step-by-step explanation:

It wouldn't be to make sure they are up to code because fire extinguishers do not use code, code is used in electronics. For the second option and the last option it would not be this because they could be trained in a practice instead of using the real thing.

7 0
2 years ago
Read 2 more answers
Other questions:
  • Help me with this if anyone can! Please and thank you
    12·1 answer
  • What’s 4 divided by 9.1
    15·1 answer
  • pearl and kacey have 10 tomato plants. kacey has four times as many as pearl. how many plants does kacey have?
    9·2 answers
  • A mayor wants to determine if the people in his city think that he is doing a good job.
    9·2 answers
  • Hasan has 18 3/4 yards if fabric. It takes 3 1/6 yards to make a pillowcase. Hasan plans to make as many as pillowcases as he ca
    14·1 answer
  • List 2 ways that two-step equations can be used in real life!
    6·1 answer
  • Can anybody help me with this number 9 ? show work please and thank you
    12·1 answer
  • Tasneem has a sample of 12 bags of candy. She recorded the mass, in grams, of each bag. Her data is shown.
    8·2 answers
  • Please help me with this problem.
    10·2 answers
  • 14. In the figure below, AABC-ADEF. Find the ratio<br> DF<br> 10<br> D<br> ОА :<br> OD<br> Not link
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!