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
LekaFEV [45]
3 years ago
15

Simplify 4 radical 20- 3 radical 45

Mathematics
1 answer:
liberstina [14]3 years ago
8 0
4\sqrt{20}-3\sqrt{45}= 4*2\sqrt{5}-3*3\sqrt{5}= \\\\ =8\sqrt{5}-9\sqrt{5}= \\\\ =\boxed{-\sqrt{5}}
You might be interested in
If a polynomial function f(x) has roots -8, 1, and 6i, what must also be a root of f(x)?
Naddik [55]

Answer:

it must also have the root : - 6i

Step-by-step explanation:

If a polynomial is expressed with real coefficients (which must be the case if it is a function f(x) in the Real coordinate system), then if it has a complex root "a+bi", it must also have for root the conjugate of that complex root.

This is because in order to render a polynomial with Real coefficients, the binomial factor  (x - (a+bi)) originated using the complex root would be able to eliminate the imaginary unit, only when multiplied by the binomial factor generated by its conjugate: (x - (a-bi)). This is shown below:

(x-(a+bi))*(x-(a-bi))=\\(x-a-bi)*(x-a+bi)=\\([x-a]-bi)*([x-a]+bi)=\\(x-a)^2-(bi)^2=\\(x-a)^2-b^2(-1)=\\(x-a)^2+b^2

where the imaginary unit has disappeared, making the expression real.

So in our case, a+bi is -6i (real part a=0, and imaginary part b=-6)

Then, the conjugate of this root would be: +6i, giving us the other complex root that also may be present in the real polynomial we are dealing with.

5 0
3 years ago
It takes 12 men 5 days to complete a job. Work out how many days it would take 3 men to complete the same job.
frutty [35]

Answer:

20 days

Step-by-step explanation:

It takes 12 men 5 days to complete a job. Work out how many days it would take 3 men to complete the same job.

12 * 5 = 60

60/3 = 20

It will take 3 men 20 days to do the same job

3 0
2 years ago
Please help!! also please explain I would like to understand.​
ziro4ka [17]

Answer:

A

Step-by-step explanation:

First, put this equation in slope intercept form.

y=mx+b

Where m is the slope and b is the y intercept.

y+1>2(x-1) \\ \\ y+1>2x-2 \\ \\ y>2x-3

Since it's greater than, the solution set is above the line, effectively eliminating graph D.

Now we should graph it.

We can see that the point (2,1) is on the graph, and only Graph A has that point. Therefore, Graph A is the correct graph.

7 0
3 years ago
Read 2 more answers
In cos(0.3), what unit would 0.3 be? Is it radians? Also if you were to solve it, would the answer be in radians as well? Please
neonofarm [45]

Answer:

22

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Factor the trinomial, if possible. If the trinomial cannot be factored using integers, write prime.
Dominik [7]

Answer:

it can be factorized. this image gives solution

7 0
3 years ago
Other questions:
  • Will give brainliest please help asap
    6·1 answer
  • The function g(x) = –x2 + 16x – 44 written in vertex form is g(x) = –(x – 8)2 + 20. Which is one of the transformations applied
    8·2 answers
  • Write a function that solves the matrix equation Ax = b using Gaussian Elimination (book section 6.2). Your function should acce
    11·1 answer
  • 1. There is a Chick-fil-a exactly 7 miles west of
    6·2 answers
  • A fair die is rolled 10 times. What is the average number of even number outcomes?
    13·2 answers
  • GET THIS RIGHT GET BRAINLYEST!!!<br><br> whats 4 plus 4?????
    15·1 answer
  • "three food trucks are set up at points a, b, and c. each of the three trucks is the same distance from the food distributor. at
    14·1 answer
  • Please helppppppp. <br> 5<br> 15<br> 32<br> 40
    12·2 answers
  • I need help pleaseeeeeeeee
    5·1 answer
  • What is 3(a-7) simplifyed
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!