(My Math Problem) Use properties of operations to determine whether the expressions are equivalent.

2k + 5 + 2k and 5 + 4k

The expressions are not a equivalent or they are equivalent?

What’s the ratio in simplest form if you count 14 robins out of 150 birds

Which statement best explains why ben uses the width hi to create the arc at j from point k

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?