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
Tasya [4]
2 years ago
5

Simplify the radical expression by rationalizing the denominator.

Mathematics
1 answer:
artcher [175]2 years ago
4 0
\frac{4}{\sqrt{21}} = \frac{4}{\sqrt{21}} \times \frac{\sqrt{21}}{\sqrt{21}} =\boxed{ \frac{4\sqrt{21}}{21}}
You might be interested in
18-3×5+32÷4 (show with procedure fast..)​
EastWind [94]

Answer:

18-3*5+32÷4

=18-3*5+8

=18-15+8

=26-15

=11

Step-by-step explanation:

use BODMAS rule

5 0
3 years ago
Read 2 more answers
Unknown angle problems (with ale<br> Solve for I in the diagrarn below.<br> (24 + 45)<br> f<br> TE
astraxan [27]

Answer:

x = 45

Step-by-step explanation:

The angles with (2x + 45) and x are supplementary angles, meaning they add up to 180°. We can write this statement as an algebraic equation of 2x + 45 + x = 180 and solve it.

Step 1: Combine like terms.

  • (2x+x)+45=180
  • 3x+45=180

Step 2: Subtract 45 from both sides.

  • 3x + 45 - 45 = 180 - 45
  • 3x = 135

Step 3: Divide both sides by 3.

  • 3x/3 = 135/3
  • x = 45

Step 4: Check if solution is correct.

  • 2(45) + 45 + 45 = 180
  • 90 + 90 = 180
  • 180=180

Therefore, x = 45.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

8 0
2 years ago
I need an explanation as to why the other three are wrong aswell
storchak [24]

Answer:

B

Step-by-step explanation:

B is the only one that has only 2 sides of the same length and one that doesn't match the other 2.

A doesn't have any of the lengths being the same

C. is a right triangle, although there can be isosceles right triangles they still need to have only 2 lengths that are the same and in this one, all the values are different

D. This is an equilateral triangle, this has more than 2 lengths that are the same

8 0
2 years ago
a fruit salad is made from pineapples, pears, and peaches mixed in the ratio of 2 to 3 to 5, respectively, by weight. what fract
musickatia [10]
2/10 or 1/5, which is 20%
6 0
3 years ago
Lmk ASAP please you’re the
tamaranim1 [39]

9514 1404 393

Answer:

  a ≈ 4.68

Step-by-step explanation:

The law of cosines tells you ...

  a² = b² +c² -2bc·cos(A)

  a = √(b² +c² -2bc·cos(A))

  a = √(5² +8² -2·5·8·cos(33°)) = √(25 +64 -80·0.83867) ≈ √21.906

  a ≈ 4.68

6 0
3 years ago
Read 2 more answers
Other questions:
  • A zip line starts 35 feet above the ground and has one landing platform. The line is secured into the ground
    5·2 answers
  • To complete her holiday wrapping, Bella needs identical
    5·1 answer
  • Dennis deposits $6,000 in an account that earns 5.5%simple interest. How long will it take before the total amount is $8,000?
    13·2 answers
  • Consider the points Q(23, 48) and R(7, 62). What is the component form of Vector Q R?
    14·2 answers
  • If mAD
    10·1 answer
  • What is 84,052 in word form
    10·2 answers
  • If complex number z = 3 Left-bracket cosine (StartFraction 3 pi Over 2 EndFraction) + I sine (StartFraction 3 pi Over 2 EndFract
    11·2 answers
  • I need help bad. It's about finding angles and I can't really figure it out.
    13·1 answer
  • PLS HELP ASAP. QUESTION IN PICTURE
    5·2 answers
  • James, Gilbert, Matthew, and Simon ran in a relay race. Their times are listed in the chart below. Student James Gilbert Matthew
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!