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

Since you have not mentioned any numbers to find the difference, I will assume the numbers on my own to be 6 and (-9).

To find the difference of these two numbers, you will need 6 white tiles and 9 black tiles.

Now to subtract (-9) from 6, you need the 9 black tiles to be replaced with 9 white tiles and change the subtraction sign to addition. Adding them will give you a result of 15 which will be white tiles.

6 - (-9) = 6 + 9 = 15

15 white tiles

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it