Complete the statements to describe the graph that represents the equation 0.4(x + 3) = (y – 6)2. The vertex is
.

The directrix is
.

The focus is
.

The focal width is
.

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.