When a figure is dilated, the corresponding angles created are always
1.congruent
2.similar
3.enlarged
4.reduced

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog