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3 years ago

Use algebra tiles to find the difference. Let one white tile equal +1 and one black tile equal –1. 10 – 9

1 answer:

5 0

Put 10 white tiles on the table Then start covering each white tile with a black tile It will be 1 white tile that is not covered So 10-9=1

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What is the center of the circle that you can circumscribe about a triangle with vertices A(2, 6), B(2, 0), and C(10, 0)?

denis23 [38]

The three points A,B,C are all points on this circle.
Each point is then equal distance from the center, that distance being the radius of the circle.
Using the distance formula, we can find the center of the circle (x,y):
$d^2 = (x-x_0)^2 + (y-y_0)^2$
Plugging in points A and B into distance formula, then setting them equal to each other gives:
$(x-2)^2+(y-6)^2 = (x-2)^2 + y^2$
Right away we can cancel out the x terms leaving:
$(y-6)^2 = y^2$
Expand Left side and Solve for y:
$y^2 -12y +36 = y^2$
$y = 3$
Plug in points B and C as before:
$(x-2)^2 + y^2 = (x-10)^2 + y^2$
Here we can cancel the y-terms.
Expand and solve for x:
$x^2 -4x+4 = x^2 -20x+100$
$16x = 96$
$x = 6$
Therefore the center of the circle is the point (6,3)

6 0

4 years ago

If a =(9,18) and b=(1,12) what is the length of ab

cupoosta [38]

Answer:

AB = 10

Step-by-step explanation:

Use the distance formula: √(12 - 18)^2 + (1 - 9)^2

√36 + 64

7 0

3 years ago

A class is made up of 8 boys and 8 girls

rodikova [14]

Hello,

The answer is "8:8 or 1".

Reason:

There are 8 boys and 8 girls therefore the ratio would be...

8:8

8:8=1

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

3 0

3 years ago

There are 20 packages of beef in a restaurant freezer. The average weight of 14 of the packages is 2 lb. The remaining packages

Shtirlitz [24]

I belive that the answer is about 180 lb.

3 0

3 years ago

Read 2 more answers

The length of a rectangle is 10 feet longer than it is wide. If each side is increased 10 feet, then the area is multiplied by 2

harina [27]

Answer:

The with and length of the original rectangle are:

width: 20 ft

Length: 30 ft

Step-by-step explanation:

Lets check

Yes, 30 is 10 longer then 20,

the area of the original is 600

if it was 40 and 30 then it would equal 1200

6 0

3 years ago