Which is the expression of twenty sixths and twenty A. two fifths plus four tenths
B. four-fifths plus two fourths
C. one half plus three tenths
D. three fourths plus two fifths

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

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?

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis