The sum of two opposite angles of a quadrilateral is 280°. The other two angles are equal. Find the measure of the equal angles. (Please)

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

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

Glenda makes an online purchase for picture frames for $12.95 each and formats of $5.89 each the site says it taxes paid by the customer or 6.5% of the total purchase price shipping charges are based on the