Whitney is decorating a rectangular ballroom ceiling with garland. Beginning in a corner, Whitney strings garland along the length of the ceiling, a distance of 42 meters. Next, Whitney strings garland along the width of the ceiling, a distance of 40 meters. Then Whitney strings the garland straight back to the original corner. At this point, how much garland has Whitney used?

140

Step-by-step explanation:

A^2+B^2=C^2

40^2+42^2=X^2

1,600+1,764=X^2

3,364=X^2

= X^2

58=x

Last-

40+42+58=140

it is x=-4

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.