Label the points, lines, and planes to show CD and line q perpendicular to each other in plane X at point D, plane Y intersecting plane X in line s, and CD both perpendicular to line s and intersecting line l at point C.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

the answer is 99.

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.