Y=x^2+2x
Btw the X^2 means x to the power of 2
QUESTION:
A battery was charged. When the charging began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent full. how fast did the battery charge and how long did it take?
Solution :
<u>Given</u>
- Initial amount of charge = 23%
- Amount after charge = 89%
<u>procedu</u><u>re</u>
Let the rate of charging be r .
r = (change in charge level) / (time interval) = (89% - 23%) / (30 min) = 2.2 % per minute
charge = (rate of charging)(time) + (initial charge)
100% = r*t + 23%
100% = (2.2 %/min)t + 23%
Solve for t and get
t = [(100 - 23) / 2.2]
Answer = 35 min
Answer:
Yes
Step-by-step explanation:
Longest side < sum of two other sides
Is a condition to form a triangle
12 < 7+9
12 < 16
So, yes
The slope-point form of line:

We have the points (-9, 7) and (6, 2). Substitute:

The slope-intercept form of line:
.
We have the slope m:

Pu the coordinates of the point (6, 2) to the equation:

<em>add 2 to both sides</em>


Answer:
Step-by-step explanation:
s=5?
t=5?
3(5) - 3(5) +3
(15) -15 = 0
0 + 3 = 3