Answer:

Step-by-step explanation:
If x is inversely porportionaly to y, then for some constant k,

Since y is 4 when x = 18, k is equal to 4*18=72, so the equation is:

Answer:
Each combo costed $4.95
Step-by-step explanation:
To solve, simply divide 103.95 by 21, and then put a dollar sign. (Most teachers would count no dollar sign as incorrect/points off, so don't forget it!)
103.95 ÷ 21 = 4.95 → $4.95
<em>Hope this helps!</em>
Answer:
√178
Step-by-step explanation:
Distance formula: 
Simply plug in your coordinates into the distance formula to find the distance between them.
Answer:
Acute Acute Right Obtuse
Step-by-step explanation: