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3 years ago

I will give brainiest to whoever answers correctly !!

Mathematics

2 answers:

Naily [24]3 years ago

6 0

470 was sold in 2011 and 429 in 2012. So there was a decrease of (470-429) = 41.

To find the percentage decrease, we take the decrease and we divide by the original number and multiply by 100.

Decrease = 41
Original number = 470
% decrease = (41/470)*100 = 8.72%

Georgia [21]3 years ago

3 0

Answer:

I don’t know the answer I just need some points to ask more questions !!! have a good day !!

Step-by-step explanation:

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The radius of a circle is 7 centimeters. What is the area?

krek1111 [17]

Answer:

49开

Step-by-step explanation:

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2 years ago

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5(3x+2)-2(4x-1) Can someone help me by showing step by step on what to do please?

Eduardwww [97]

To solve this we need to use this formula:

$a(b + c) = ab + ac$

$5(3x + 2) - 2(4x - 1) = 15x + 10 - 8x + 2 = \\ = 7x + 12$

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2 years ago

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3. (5 + 2) = (3 . 5) + (3 . 2) *

UNO [17]

Answer:

C) Distributive Property

Step-by-step explanation:

You're distributing in the 3 when you multiply it by the 5 and the 2 in the algebraic process:

➦ ➦

3•(5 + 2) = (3 • 5) + (3 • 2)

So, the 3 was distributed between the 5 and 2 when you multiplied.

Hence, this is the distributive property.

8 0

3 years ago

A circle has a diameter with endpoints at (6, 5) and (8, 5). Write the equation for the circle.

mario62 [17]

Answer:

$(x-7)^2+(y-5)^2=1$

Step-by-step explanation:

The two things that are required to formulate the equation of the circle is the center coordinate and the radius of the circle!

Center of the circle:

The center of the circle always lies at the midpoint of the endpoints of its diameter: Let's call the endpoints A(6,5) and B(8,5).

Using the midpoint formula we'll get:

$(x_m, y_m) = \left(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\right)$

$(x_m, y_m) = \left(\dfrac{6+8}{2},\dfrac{5+5}{2}\right)$

$(x_m, y_m) = (7,5)$

This is the center coordinate of our circle.

Radius:

The radius of the circle is the distance from the center of the circle to any of the endpoints of the diameter (A or B)

We can use the distance formula:

$r = \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$

$r = \sqrt{(x_1-x_m)^2+(y_1-y_m)^2}$

$r = \sqrt{(6-7)^2+(5-5)^2}$

$r = \sqrt{1^2}$

$r = 1$

Equation of the circle:

The equation is written as:

$(x-a)^2+(y-b)^2=r^2$

here, (a,b) are the center points of the circle

in our case this is $(a,b)=(x_m,y_m)=(7,5)$

and r = 1

$(x-7)^2+(y-5)^2=1^2$

$(x-7)^2+(y-5)^2=1$

This is the equation of the circle!

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2 years ago

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ch4aika [34]

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