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lara31 [8.8K]
3 years ago
7

What is the square root of81

Mathematics
1 answer:
iogann1982 [59]3 years ago
3 0

Answer:

The answer is 9

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Could u guys help me plz?
Harman [31]

9514 1404 393

Answer:

  • 84.7 units²
  • 118.125 in³

Step-by-step explanation:

The surface area of the triangular prism is the sum of its base areas and the lateral area. The total area of the two triangular bases is ...

  A = bh = 7(6.1) = 42.7 . . . square units

The lateral area is the product of the perimeter of the base and the length of the prism. The height given for the prism is consistent with it having triangular bases that are equilateral triangles. That is, the unmarked dimension is likely 7 units, so the perimeter is ...

  P = 7+7+7 = 21

and the lateral surface area is ...

  LA = PL = 21·2 = 42

Then the total surface area of the prism is ...

   total area = A + LA = 42.7 +42 = 84.7 . . . square units

__

The volume of a rectangular prism is given by ...

  V = Bh

where B is the area of the base, and h is the height. Your prism has a volume of ...

  V = (26.25 in²)(4.5 in) = 118.125 in³

7 0
2 years ago
9x+10y =1 9x-6y=-15 solve using elimination
Nostrana [21]

Answer:

I. x = -1

II. y = 1

Step-by-step explanation:

Given the following algebraic expressions;

9x + 10y = 1 .......equation 1

9x - 6y = -15 ......equation 2

To solve using the elimination method, we would subtract eqn 1 from eqn 2.

(9x - 9x) + (-6y - 10y) = (-15 - 1)

0x - 16y = -16

-16y = -16

16y = 16

y = 16/16

y = 1

Next, we would find the value of x;

From eqn 1;

9x + 10y = 1

Substituting the value of y, we have;

9x + 10(1) = 1

9x + 10 = 1

9x = 1 - 10

9x = -9

x = -9/9

x = -1

3 0
3 years ago
A = 4, n = 8, y = 2, x = 10 Evaluate the algebraic expression x + 3y - n. 6 8 12 D 24​
jolli1 [7]

Answer:

B. 8

Step-by-step explanation:

By evaluate, they mean substitute in the values and solve.

x + 3y - n

= 10 + 3(2) - n

= 10 + 6 - 8

= 8

Please lmk if you have questions.

4 0
3 years ago
What is the relationship between fractions and decimals?
Tanzania [10]
The relationship between fractions and decimals is that with a fraction you are dividing whereas a decimal is treated like a number.
i.e.      1/4=0.25
Think of decimals as 100 being the whole or 1 so split 100 into 4 and you get 25 or 0.25
4 0
3 years ago
Please help me, i only have 30 mins.
Aleks04 [339]

Answer:

Width is 24, length is 40

Step-by-step explanation:

64 can be split into 8 groups of 8, and the 8 groups can be split into 3 and 5. Then, take 3 x 8 for the width and 5 x 8 for the length, and you have the answer! I wish to you best of luck!

4 0
2 years ago
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