Hopefully this will help you.
Answer:
<h2>R(c - a, b)</h2>
Step-by-step explanation:
Look at the picture.
R(x, y)
y - is the same as second coordinate of the point Q → y = b
x - is first coordinate of the point S reduced by distance a → x = c - a
Answer: -58 1/2 degrees F
Step-by-step explanation: change the hours into minutes then divide the minutes by 10, then multiply the change in temperature for every 10 minutes