What is 2+4+3+6-7-10*23/100?

IT HAPPENED AGAIN
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For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

Side xy of triangle xyz is extended to point w, creating a linear pair with ∠wyz and ∠xyz. measure of an exterior angle what is the value of x? 64 80 100 180

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25