Answer:
5 pizzas and 17 sodas were bought
Step-by-step explanation:
Here, we want to get the number of pizza and sodas bought
Let n be the number of pizzas bought
we are told that the number of sodas bought was 2 more than 3 times the number of pizzas
So the number of sodas will be;
3n + 2
So let’s have the equations based on the prices;
pizzas cost $9.50, soda cost $1.25
Thus;
9.5n + 1.25(3n + 2) = 68.75
9.5n + 3.75n + 2.5 = 68.75
13.25n = 68.75 - 2.5
13.25n = 66.25
n = 66.25/13.25
n = 5
Number of pizzas bought is 5
number of soda is 3n + 2 = 3(5) + 2 = 15 + 2 = 17
The X-intercepts are where the blue line cross the X-axis.
There is a black dot at (-3,0) and (1,0)
The answer would be the 2nd choice.
Use the formula d = rt
where d is the distance
r is the rate
t is the time
when you go pier A to B with the current of 2.5 mph
D = (r + 2.5) 2
D = 2r + 5
when you go back
D = ( r - 2.5) 6
D = 6 r - 15
so 2r + 5 = 6r - 15
r = 5 mph
d = 2r + 5
d = 2(5) + 5
d = 15 miles
T is time, and s is speed. T is inversely proportional to s