The difference of 2 squared numbers equals 53, what are the numbers

Which equation can be used to solve for the unknown number? seven less than a number is thirteen. n-7=13 7-n=13 n+7=13 n+13=7

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels