Krin buys 3 headbands and 2 wristbands. His brother Clay buys 4 headbands and 1 wristband. What is the total cost?

An algebraic expression to represent this would be

Step-by-step explanation:

3h + 2w + 4h + 1w = total cost

Or! (Possibly more correct)

7h + 3w = c

h = cost of headbands

w = cost of wristbands

c = total cost

step-by-step explanation:

answer:   the paragraph proof is mentioned below.

step-by-step explanation:

given: in a δxwy where

such that, ∠wzx ≅ ∠yzx and zw≅zy

we have to prove that: segment zx is a perpendicular bisector of segment wy.

prove: since, zw≅zy ⇒ ∠wzy is a supplementary angle.

then, ∠wzy= 180°

⇒∠wzx + ∠yzx = 180° ( because xz divides ∠wzy into two parts)

but, ∠wzx ≅ ∠yzx ( given)

⇒∠wzy+∠wzy=180° ( by substitution)

⇒2∠wzy=180°

⇒∠wzy=90°

⇒∠wzy=∠yzx =90°

therefore, xz⊥wy where wz=zy

⇒zx is a perpendicular bisector of wy.