High school geometry anyone?
i will give brainliest : ) i'm really struggling.

me find the length of ec below, and explain thoroughly. you can round your final answer if you wish.
additional info:
de is parallel to ac.
angle c is 60°.
angle a and angle bde are both right angles.
triangle abc is similar to triangle dbe.
: )

Therefore the length of EC is 6.67 ft.

Step-by-step explanation:

Given:

BC = 12 ft

AC = 6.75 ft

DE = 3ft

DE is parallel to AC.

Angle C is 60°.

Angle A and Angle BDE are both right angles.

Triangle ABC is similar to Triangle DBE.

To Find:

EC = ?

Solution:

Δ ABC ~ Δ DBE ..................Given

If two triangles are similar then their sides are in proportion.

On substituting the given values we get

Now as B - E - C,

..........Addition property

substituting the given values we get

Therefore the length of EC is 6.67 ft.

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation:

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)