What two operations are needed to represent eight more then a number

X+y=-4 x-y=2 use elimination with adding and subtraction

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet