There was a total of $9.48 million contributed to a political campaign by 79 thousand people. What was the average contribution?
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Let x be marked up price. We have been given that a chemistry set costing $27.50, marked up 32% on cost.
Therefore, mark up price is $8.80.
Since we know that selling price of any item equals the sum of cost and mark-up price of the item.
Let us find selling price of our chemistry set.
Therefore, the selling price of the chemistry set is $ 36.30.
Answer:
1) AB ⊥ BD, AB ⊥ BC, AC = AD Reason: Perpendicular Lines Form Right Angles
2) ∠ABC and ∠ABD are right angles
3) AB = AB Reason: Reflexive Property of Equality.
4) △ABC ≅ △ABD Hypotenuse - Leg Postulate.
Step-by-step explanation:
Given: AB ⊥ BD AB ⊥ BC AC = AD Prove: △ABC ≅ △ABD 1. AB ⊥ BD, AB ⊥ BC, AC = AD
1) AB ⊥ BD, AB ⊥ BC, AC = AD Reason: Perpendicular Lines Form Right Angles
If there are perpendicular lines between the line segment AB and BD, check the graph below, then this pair of line segment form a perpendicular line.
2) ∠ABC and ∠ABD are right angles
Notice that the hypotenuses are congruent. We should say AC ≅ AD. This information is vital for the Hypotenuse Leg Theorem.
3) AB = AB Reason: Reflexive Property of Equality.
Reflexive Property of Equality says that each line segment, angle or shape is congruent to itself.
4) △ABC ≅ △ABD Hypotenuse - Leg Postulate.
If two right triangles with congruent hypotenuses and one congruent leg then, we can say these two triangles are congruent ones. The proof of this Theorem is obtained by the Pythagorean Theorem, and then by side side side congruence, we can be sure both triangles are congruent.
