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kolbaska11 [484]
3 years ago
7

Simplify the square root of 20 divided by 81

Mathematics
1 answer:
algol [13]3 years ago
7 0
Simple....

although the radical cannot be simplified, it can be approximated....

so you have...

\frac{ \sqrt{20} }{81}

to simplify find a perfect root....

making your answer....

\frac{2 \sqrt{5} }{81}

Thus, your answer.
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What is the quotient of 11/12 ÷ 5/7 ?
alexandr402 [8]
Your answer is 77/60 or 1 17/60
6 0
3 years ago
A rectangular swimming pool has a perimeter of 96 ft. The area of the pool is 504 ft2. Which system of equations models this sit
gregori [183]

Answer:

2l + 2w = 96 ..... eqn1

lw = 504 ...... eqn2

Step-by-step explanation:

To model this case where we have two unknowns l and w, we need two equations.

Firstly, the perimeter of a rectangle is given by

2l + 2w = p

Where l,w and p are length, width and perimeter of the rectangle respectively.

Hence,

2l + 2w = 96 ... eqn1

Secondly, the area of a rectangle is given by

Length × width = Area

Hence,

l × w = 504

lw = 504 ... eqn2

With these two equations the solutions to the length and width of the rectangular pool can be derived.

3 0
4 years ago
A cylinder has a radius of 6 centimeters and a height of 18 centimeters. A smaller cylinder has linear dimensions that are one-t
vlabodo [156]

Answer:

the larger cyclinder has a surface area which is 9 times the surface area of the smaller cyclinder.

Step-by-step explanation:

Surface area of larger cyclinder

Radius = 6cm

Height = 18cm

A = 2πrh + 2πr^2

= 2*3.14*6*18 + 2*3.14*6^2

= 678.24 + 226.08

= 904.32 cm

Smaller cyclinder (1/3 of the larger cyclinder)

Radius = 2cm

Height = 6cm

A = 2πrh + 2πr^2

= 2*3.14*2*6 + 2*3.14*2^2

= 75.36 + 25.12

= 100.48 cm

Comparing the surface area of the larger cyclinder and the smaller cyclinder

= 904.32 cm / 100.48 cm

= 9

This means, the larger cyclinder has a surface area which is 9 times the surface area of the smaller cyclinder.

5 0
3 years ago
Please help me!! It's some sort of PreAP math stuff
olga55 [171]

Answer:

12x + 40y

Step-by-step explanation:

4(3x+10y)

multiply the outer number (4) with all the terms inside the parentheses

4 X 3x + 4 X 10y

12x + 40y

3 0
3 years ago
A bag contains six red marbles three green marbles and four blue marbles if we choose a marble then another marble without putti
ryzh [129]

Answer:

2/13

Explanation:

The bag has 6 red, 3 green, 4 blue.

Total marbles = 13

Probability of getting <u>blue the first time</u> would be 4/13 because 4 of the 13 total marbles are blue

Because you're not putting back the first marble, the total would go down to 12, so the probability of getting <u>red the second time</u> would be 6/12 or 1/2

The probability that the first marble is blue and the second marble is red = (4/13)(6/12) = 2/13

8 0
3 years ago
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