Answer:
15
Step-by-step explanation:
Given: y is directly proportional to when x = 7, y = 9
To find: y when x = 23
Solution:
u and v are said to be proportional if where k is a constant of proportionality.
As y is directly proportional to when x = 7, y = 9,
Put x = 7, y = 9
Put x = 23
Answer:
The answer is D
Step-by-step explanation:
Answer:
C. 2
Step-by-step explanation:
-11- (-13)
=-11+13 [negative plus negative =positive ;so, -(-13)=+13 ]
=2
Answer:
V = 160mph
Step-by-step explanation:
We need to start from the formula of speed: V=d/t
We have two travels, with and against the wind, both done in the same time.
Clearing t from the formula, we will have: t=d/V2
450miles/V-35mph (speed of the wind is subtracted)
702miles/V+35mph (speed of the wind is subtracted)
Now, we find V:
450miles/V-35mph = 702miles/V+35
450*V+35 = 702*V-35
450V+15,750 = 702V-24,570
702V-450V = 15,750 + 24,570
252V = 40,320
V = 40,320/252
V = 160mph
Problem 1 Answer: x = 2/3y+8
Show Work:
Step 1: Add 2y to both sides.
3x−2y+2y=24+2y
3x=2y+24
Step 2: Divide both sides by 3.
3x/3 = 2y+24/3
x = 2/3y+8
Problem 2 Answer: x=−2y+48
Show Work:
Add -2y to both sides.
x+2y+−2y=48+−2y
x=−2y+48