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stepan [7]
3 years ago
9

Simplify 20 What the answer?

Mathematics
2 answers:
uysha [10]3 years ago
8 0

Answer:

2√5

Step-by-step explanation:

√20

√4 ×√5

2√5

Follow Me Please

Ipatiy [6.2K]3 years ago
4 0

Answer:

2√5

Step-by-step explanation:

√20=√2⋅2⋅5. =√22⋅5. =2√5.

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The sum of three numbers is 79. The sum of five times the first number and two times the
stepan [7]

Answer:

(x+y+z)=79

5x+2y+z=859

2x+3y+9z=498

Step-by-step explanation:

Its writing 3 different equations that have the same value for the same variable.

3 0
3 years ago
Alexander is building a rectangular pen in his backyard for his dog. The pen will have a length of 13 feet and a width of 2x fee
Drupady [299]

4x+26

Step-by-step explanation:

to buy fencing, you need to find the perimeter of the pen. The perimeter is found by adding all sides together.

So, 13+13+2x+2x=4x+26

5 0
2 years ago
Express the complex number in trigonometric form.<br> -6 + 6 sqrt3 i
11Alexandr11 [23.1K]

Answer:

The trigonometric form of the complex number is 12(cos 120° + i sin 120°)

Step-by-step explanation:

* Lets revise the complex number in Cartesian form and polar form

- The complex number in the Cartesian form is a + bi

-The complex number in the polar form is r(cosФ + i sinФ)

* Lets revise how we can find one from the other

- r² = a² + b²

- tanФ = b/a

* Now lets solve the problem

∵ z = -6 + i 6√3

∴ a = -6 and b = 6√3

∵ r² = a² + b²

∴ r² = (-6)² + (6√3)² = 36 + 108 = 144

∴ r = √144 = 12

∵ tan Ф° = b/a

∴ tan Ф = 6√3/-6 = -√3

∵ The x-coordinate of the point is negative

∵ The y-coordinate of the point is positive

∴ The point lies on the 2nd quadrant

* The measure of the angle in the 2nd quadrant is 180 - α, where

  α is an acute angle

∵ tan α = √3

∴ α = tan^-1 √3 = 60°

∴ Ф = 180° - 60° = 120°

∴ z = 12(cos 120° + i sin 120°)

* The trigonometric form of the complex number is

  12(cos 120° + i sin 120°)

 

4 0
3 years ago
Read 2 more answers
What is the ratio 75:1.5 in lowest terms?
Irina-Kira [14]
I hope this will help !!

7 0
3 years ago
A swimming pool is being drained at a constant rate of 3 inches (depth of the water) per hour. The depth of the water after 5 ho
Blababa [14]

Answer:

y-32=3(x-5)

Step-by-step explanation:

The swimming pool is being drained at a constant rate of 3 inches per hour, therefore:

  • The rate of change, Slope, m=3 inches per hour

If the depth of the water after 5 hours is 32 inches.

The <u>depth is the dependent variable(as its values varies with time)</u> while the <u>time is the independent variable</u>, we can write this as a pair (x,y)=(5, 32).

The point slope form of the equation of a line is of the form: y-y_1=m(x-x_1)\\(x_1,y_1)=(5,32), m=3\\$Substituting these values, we obtain:\\y-32=3(x-5)\\This is the equation of the function in point slope form.

4 0
3 years ago
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