Select all expressions that are squares of linear expressions. Ox? + 7x + 49
✓
(x+3)
d? - 40 + 4
(y + 2) (y - 2)
O x2 + 64
9z2 – 36

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

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.