What is the slope of a line perpendicular to a line with equation 6x-4y=30

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

The following division is being performed using multiplication by the reciprocal find the missing numbers is 5/12 divided by x/3 equals 5/12 times x/10 equals 1/x