Find the hearts rates of you and your friend. A table shows the number of heartbeats and second for you and a friend. For you the number of heartbeats is 22 and the number of seconds is 20. For your friend, the number of heartbeats is 18 and the number of seconds is 15. You: beats per second Friend: beats per seconds. Question 2 Do these rates form a proportion? Yes or No​

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 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 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible