The sum of two numbers is 47. The greater number is 9 more than the smaller number. Which equation can be used to solve for the smaller number? Ox+(x + 9) = 47
Ox - (x + 9) = 47
OxIx + 9) = 47
xix - 9) = 47
For big exam! Help

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

How is this equation completed? i cannot find any examples in the book.