Here, as I can see, you are adding fractions, and making sure you have a common denominator.
12) is correct
13) is correct
You got a common denominator, and added them up! Great job! <span />
Answer:
x10
Step-by-step explanation:
BE=1/2 * CD
x=CB/2
x=20/2
x=10
Let, the speed of boat = x
Speed of current = y
So, x + y = 280/7
x + y = 40 ---- first equation
x - y = 280/14
x - y = 20
x = 20 + y
Substitute this value of x in first equation,
20 + y + y = 40
2y = 40 - 20
y = 20/2
y = 10
Substitute this in first equation,
x + 10 = 40
x = 30
In short, Speed of Boat = 30 mph, & speed of current = 10 mph
Hope this helps!
Answer:
1.22222
Step-by-step explanation:
Use the equation y2-y1/x2-x1=m to find the slope.
Now, just insert your known values.
15-4/4--5=m
11/9=m
1.22222 is the slope.
Hope this helps!
