Nicole wants to measure the height of a tree. she sights the top of the tree, using a mirror that is lying flat on the ground. the mirror is 34ft from the tree, and nicole is standing 10.6ft from the mirror, as shown in the figure. her eyes are 6ft above the ground. how tall is the tree? round your answer to the nearest foot.

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?