I need a step by step explanation of how to do this problem mentally and quickly:

7 3/4 - 1 2/7 - 3/2

Elisa's mom teaches at preschool. There is 1 teacher for every 12 students at the preschool. There are 276 students at the preschool. Elisa is setting up equivalent ratios to find the number of teachers at the preschool.

Rounded to the nearest thousand of 275,608

M+12=10 what is the answer to this equation?

Mrs. Cox is baking a ham for dinner. It takes 1 hour and 30 minutes to bake. The family eats at 6:15 p. m. What time should Mrs. Cox put the ham in the oven?

What is the answer to - 3t + 6=0

In right ∆ABC, m B = 90°, m C = 40°, and BC = 10. What are the other two side lengths of the triangle?

To pass a math test students must answer at least 0.6 of the questions. Donald's score is 5/8, Karen's score is 0.88, Gino's score is 3/5, and Sierra's score is 4/5. How many of the students passed the test?

Yolanda's class has 40 members. The teacher will not give a test unless at least 80% of the class is in attendance. How many class members must be present in order for the teacher to give a test?

If lemonade costs 1.5 cents per ounce, what is the cost per pint?

Consider the three functions: f (x) = Three-halves (4) x g (x) = Three-halves (4) - x h (x) = - Three-halves (4) x Which statements are true about the domain and range of f (x), g (x), and h (x) ? Check all that apply.