Answer:
a) 39 b) 17
Step-by-step explanation:
12x - 9
12(4) - 9
48 - 9
39
d/15 + 13
(60)/15 + 13
4 + 13
17
8 - 2.36 is 5.64 so 5.64 more snow happened in Dubaku's town then Elliott's Town
Answer: 1 hour 15min
Step-by-step explanation:
When Paul passes the gas station Mary si already 12.5 miles away
X=v t = 50mph 0.25h = 12.5 miles. (15min equals a quarter hour)
From that moment to the meeting point we’ll have only one t (time) and one x (final point) for both cars
For Mary we have
X= Xo + v t= 12.5 miles + 50mph t
For Paul we have
X=v t = 60mph t
As x si the same in both equations
60mph t = 12.5 miles + 50mph t
(60mph - 50mph) t = 12.5miles
10mph t = 12.5miles
t = 12.5miles/10mph
t = 1,25 h
Answer:
it should be 45°, but I haven't learned it jet
Since the temperature keeps increasing by 2°F each hour for the next 7 hours, the graph will be a straight line graph.
Let T be temperature
t be the time at temperature T
At t₁ = 0, T₁ = 43°F
At t₂ = 1, T₂ = 45°F (temperature increase by 2°F)
Using the straight-line formula to get the equation of the graph. The equation is expressed as T = mt + b
- m is the slope
- b is the intercept
Get the slope
![m=\frac{T_2-T_1}{t_2-t_1}\\ m=\frac{45-43}{1-0}\\m=\frac{2}{1} \\m = 2](https://tex.z-dn.net/?f=m%3D%5Cfrac%7BT_2-T_1%7D%7Bt_2-t_1%7D%5C%5C%20m%3D%5Cfrac%7B45-43%7D%7B1-0%7D%5C%5Cm%3D%5Cfrac%7B2%7D%7B1%7D%20%5C%5Cm%20%3D%202)
Get the intercept
Substitute m = 2 and the coordinate (0, 43) into the expression
43 = 2(0) + b
43 = b
b = 43
Get the equation of the line
T = 2t + 43
Graph the equation of temperature over time
Learn more here: brainly.com/question/17003809