The souvenir shop at the park city zoo recived a shipment of new T-shirts. Each shirt priginally cost $12 but will be sold for $15 in the souvenir shop. What is the percent markup on the shirts? (Please show calculations aswell ; I’ll make you brainlist after a day cuz mine doesn’t work when I first see the comment-)

25%

Step-by-step explanation:

we can use this formula to find percent of change:

(new value minus original value) divided by original value

(15 - 12) / 12 = 3/12 or 1/4, which is 25%

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.