Write the equation in standard form for the ellipse with vertices (-11,4) and (11,4), and co-vertices (0,6) and (0,2).

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of