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2 years ago

What’s the answer to this?!!!!!

Mathematics

1 answer:

rusak2 [61]2 years ago

8 0

Answer:

a = 6.7

Step-by-step explanation:

a² + b² = c²

a² + 6² = 9²

a² + 36 = 81

a² = 45

$\sqrt{a^2} =\sqrt{45}$

a = 6.7

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A cube has side length a.The side lengths are decreased to 30% of their original size.Write an expression in simplest form for t

jeka94

Answer:

Volume V = 0.027a^3

Step-by-step explanation:

Let a represent the length of the side length of the cube.

a.The side lengths are decreased to 30% of their original size;

l = 30% of a

l = 0.3a .....1

The volume of a cube can be expressed as;

V = l × l × l

V = l^3 .......2

Where;

l = side length

Substituting the value of l into equation 2;

V = l^3 = (0.3a)^3

V = 0.027a^3

Volume V = 0.027a^3

5 0

2 years ago

What is the solution to the system of equations

Arada [10]

Answer:

(3,-2)

Step-by-step explanation:

Got it right!!

6 0

2 years ago

Read 2 more answers

Represent the following expression algebredically: a number, x, decreased by 5

PIT_PIT [208]

X-5 is your answer. hope that helps

5 0

2 years ago

I need help plz!

Irina18 [472]

Answer:

circumference= $\pi$ D

19.5=3.14*D

<u>19.5</u> =6

3.14

D=6

Radius=3

area= $\pi$ r²

3.14*3*3=28.26

area=28 inches

Step-by-step explanation:

8 0

2 years ago

find x if the distance between points L and M is 15 and point M is located in the first quadrant. L=(-6,2) M=(x,2)

aivan3 [116]

Answer:

Therefore,

$x = 9$

Step-by-step explanation:

Given:

Let,

point L( x₁ , y₁) ≡ ( -6 , 2)

point M( x₂ , y₂ )≡ (x , 2)

l(AB) = 15 units (distance between points L and M)

To Find:

x = ?

Solution:

Distance formula between Two points is given as

$l(LM)^{2} = (x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}$

Substituting the values we get

$15^{2}=(x--6)^{2}+(2-2)^{2}\\\\225=(x+6)^{2}$

Square Rooting we get

$(x+6)=\pm \sqrt{225}=\pm 15\\\\x+6 = 15\ or\ x+6 = -15\\\\x= 9\ or\ x = -21$

As point M is located in the first quadrant

x coordinate and y coordinate are positive

So x = -21 DISCARDED

Hence,

$x = 9$

Therefore,

$x = 9$

3 0

3 years ago