How can you make the expression "61 - 7 ÷ 7 x 1/2 + 17" equal to "47" by adding parentheses?

Find the quotient. 50a2 – 98b2 -5a +7b

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?