Answer:
y=-3.667
x=
Step-by-step explanation:
-4(10y-59)+10y=86
30y+196=86
30y=-110
y=-3.667
Answer:
12 miles per hour
Step-by-step explanation:
Let speed of boat in still water be "x"
and speed of current be "c"
So, downstream rate would be "x + c"
And, upstream rate would be "x - c"
Now, given c = 4
We can use the distance formula, D = RT, where
D is distance, R is rate, and T is time
to solve this.
Downstream:
D = RT
92 = (x+4)(t)
Upstream:
D = RT
46 = (x-4)(t)
Both the times are same, we can equate both the times. Lets simplify first:
t = 92/(x+4)
and
t = 46/(x-4)
Equate:

Now, cross multiply and solve for x to get our answer:

Speed of Boat (in still water) = 12 mph
The balance changes by:
$100 - $75 + $85 - $150 in a month
-$40 / month
-$(40 * 12) / year
-$(40*12 / 365.25) /day
-$1.314 per day
-$1.31 per day to nearest cent.
Answer:
[2, 5)
Step-by-step explanation:
The vertical extent of the function is its <em>range</em>. Here, that extent is from y=2 to y=5, except that y=5 is <em>not included</em> (indicated by the open circle on the graph). So, the range is ...
2 ≤ y < 5
In interval notation, we use a square bracket when the end point is included, and a curved parenthesis when it is not.
range: [2, 5)