Answer:She placed the decimal point incorrectly when dividing. i took the test
s = standard version amount
h = high quality version amount
we know that there were 1090 downloads of the song, meaning s + h = 1090.
we also know that the total amount of MBs downloaded was 3353 MBs, and since the standard is 2.1 MBs and the high quality is 4.9MBs, then 2.1s + 4.9h = 3353.
Answer:
As the temperature increases, the number of people at the pool increases.
Part B: I think the line best fit can be one that starts at (0,0), and goes up until (28,12). The approximate slope would be 0.42, and the y-intercept is 0.
SLOPE:
(28,12)
y / x = m
12 / 28 = 0.42
Y-INTERCEPT:
(0,0)
= 0
Step-by-step explanation:
<h3>
Answer: 450 mph</h3>
========================================================
Explanation:
a = speed of airplane without any wind
a+50 = speed of the plane with the wind boosting it
distance = rate*time
d = r*t
d = (a+50)*4
This represents the plane traveling 4 hours at the speed of a+50 mph. We don't really care about the distance d.
The other equation to set up is
d = (a-50)*5
which means the plane is going slower at a-50 mph and travels for 5 hours this time.
The system of equations is
Both equations involve the same variables 'a' and d, which allows us to use substitution to solve for 'a' like so
d = (a+50)*4
(a-50)*5 = (a+50)*4
5a-250 = 4a+200
5a-4a = 200+250
a = 450
The speed of the plane, without any wind, is 450 mph
Answer:
D. 19 houses
Step-by-step explanation: