All categories

3 years ago

I need help with this question please

Mathematics

2 answers:

umka21 [38]3 years ago

7 0

Answer:

C. 9

Step-by-step explanation:

$area \: of \: square = {side}^{2} \\ \therefore \: {side}^{2} = 81 \\\therefore \: side = \sqrt{81} \\ \therefore \: side = 9 \: feet$

Hence, side length of square = 9 feet.

Natasha_Volkova [10]3 years ago

3 0

Answer:

9 ft

Step-by-step explanation:

Area = 81 ft²

Area of square = length x length

A square has all its sides equal

Therefore

Area = L²

L² = 81 ft²

Find square root of both sides

sq rt L² = sq rt 81 ft²

L = 9 ft

Therefore length of the square = 9 ft

I hope this was helpful, please rate as brainliest

You might be interested in

Do anyone know how to answer this?

ANTONII [103]

Answer:

Step-by-step explanation:

8 0

3 years ago

Garrett ran 3 1/4 miles on Monday. on Wednesday he ran 2 2/3 miles father than on Monday. on Friday he ran the same distance as

vlabodo [156]

3 1/4 + 2 2/3

3 1/4= 13/4
2 2/3= 8/3

13/4+8/3= 5 11/12

6 0

3 years ago

What is the best first step for solving the given system using substitution while avoiding fractions? =9x+4x=10 -9x+3y=3

aivan3 [116]

Answer:

Solve for y in the second equation

Step-by-step explanation:

We assume your system is ...

-9x +4y = 10
-9x +3y = 3

Dividing the second equation by 3 gives ...

-3x +y = 1

so an expression for y without fractions can be found by solving for y, that is, by adding 3x:

y = 3x +1

_____

Comment on alternate solution

We'd be tempted to solve the first equation for -9x and substitute for that.

-9x = 10 -4y

(10 -4y) +3y = 3 . . . . . substitute for -9x

-y = -7 . . . . . . . . . . . . . simplify, subtract 10

y = 7 . . . . . . . . . . . . . . multiply by -1

3 0

3 years ago

Read 2 more answers

Find the equation of a circle that has its center at (-4, 3) and has a radius of 5. (x + 4) 2 + (y - 3) 2 = 25

Andreas93 [3]

Answer:

$(x+4)^2 + (y-3)^2 = 25$

Step-by-step explanation:

You can use the center of a circle to write an equation in vertex form. Vertex form is $(x-h)^2+(y-k)^2 = r^2$ and the vertex is (h,k). Notice (h,k) are the opposite sign in the equation then as the point.

Here h = -4 and k = 3. Substitute these values and the value r = 5.

$(x--4)^2 + (y-3)^2 = 5^2\\(x+4)^2 + (y-3)^2 = 25$

3 0

2 years ago

Order of numbers from greatest to least using negative 9.7 and -9

PtichkaEL [24]

Answer:

-9, 9.7

Step-by-step explanation:

3 0

2 years ago