An elevator has a weight capacity of 13 adults. when 9 adults and 10 children get on, the elevator is at full capacity. using 150 pounds as the average weight of an adult, estimate the average weight of a child.

step-by-step explanation:

you can't solve x because it is 2 linear equation and you only have one equation

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus