Answer:
b
Step-by-step explanation:
Answer:
<h2>

</h2>
Step-by-step explanation:

Expand the terms in the bracket and simplify
That's

Using the subtraction property subtract 10x from both sides of the equation

<u>Add 6 to both sides of the equation</u>

<u>Divide both sides by 8</u>

<u>Reduce the fraction with 2</u>
We have the final answer as

Hope this helps you
The diagonals of a rhombus are perpendicular bisectors of each other, and are also angle bisectors. The 4 congruent right triangles the rhombus is cut into by the two diagonals are 30-60-90 degree triangles, the longer leg is √3/2 of the hypotenuse, √3/2 of 10=5√3. so the longer diagonal is twice of 5√3=10√3