Question

What’s the awnser to this please

Answer 1

Answer:

BC=6

Step-by-step explanation:

The perimeter is the sum of all the side lengths.

Thus, add up all the sides.

And we already know the perimeter is 64. Thus:

$(3z)+(10)+(z-1)+(2z+3)+(10)=64$

Combine like terms and add the numbers:

$6z+22=64$

Subtract 22 from both sides:

$6z=42$

Divide by 6:

$z=7$

So, z is 7.

BC is z-1. Therefore:

$BC=z-1\\BC=7-1=6$

So, BC is 6.