The school has 550 students, 30 teachers, and 10 administrators. What is the ratio of teachers to students?

The ratio of teachers to students is 55:3.

Step-by-step explanation:

If you took the students and the teachers you could tell that simplifying the ratio was possible, so I divided the both by 10 and got 55:3. I could see there were no more possible simplifications, therefore, 55:3 is the ratio you are looking for. If you didn't need it simplified the answer is 550:30. Have a great day!

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

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to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.