Math word problem. What's the equation I use?

Jordan wants to figure out the height of a tree in his yard. He is 5 feet tall and his shadow is currently three feet long. The measure of the tree's shadow is 9 feet long. How tall is the tree?

Exercise: Trigonometry 2. A man lying down on a 40m cliff, with its base in the sea, spots a boat sinking. It has an angle of depression of 29.5°. a. Draw a diagram to show this information

Simplify 5/6 - 7/12 - 5/3

Where, if any, did Jordana first make a mistake in her work? Jordana made a mistake when finding the scale factor. Jordana made a mistake when she calculated the length of side A. Jordana made a mistake when she calculated the length of side B.

The sum of the coefficeints (3x-2y) ^10 is a. 1 b. 1024 c. 58,025 d. 59049

Find the sum of the following infinite geometric series, if it exists. 2 + 6 + 18 + 54 + ... And when you answer this question ive seen a lot of people just adding it together and saying thats the answer and that is not how you do it

Greg had a vegetable garden that was 4 feet wide by 5 feet long. He increased the length of his harden by 2 feet and doubled the width.

72/1000 as a decimal

1000x 300/5 I know this already but I'm giving away coins

What division sentence means the same as the following subtract sentences? 12-4=8 8-4=4 4-4=0

The ratio of boys to girls in a group is 7:1. If there are 54 more boys than girls, work out how many boys there are.