A = 210 + 20(h - 7) <== ur equation
if she earns 410 tutoring...
410 = 210 + 20(h - 7)
410 = 210 + 20h - 140
410 = 20h + 70
410 - 70 = 20h
340 = 20h
340/20 = h
17 = h <=== she spent 17 hrs tutoring
Answer:
Step-by-step explanation:
I don't really know what your question is asking for but I can tell you there's a quadratic formula that solves for x-ints. There's a quadratic equation which is Ax + bx + c = 0.
Answer:
Step-by-step explanation:
8a^12
----------
b^6
^ means to the power of, problem is that i have a hard time adding the actual symbol.
so when you see ^ when you answer you would have to put it like this:
12
8a
--------
6
b
Answer: 26
Step-by-step explanation:
10 : 3 means for every 3 songs he kept, he deleted 10
He deleted 20
10 * 2 = 20
3 * 2 = 6
He deleted 20 songs, and kept 6.
So, he had 26 songs on his MP3 player.
20 + 6 = 26
Answer: Last Option

Step-by-step explanation:
In this case we have a uniform probability. In the graph the horizontal axis represents the possible values of the variable x and the vertical axis represents the probability P(x).
To calculate the probability that x is between 4.71 and 7.4 we calculate the area under the curve.
The horizontal length between 4.71 and 7.4 is:
.
Then notice that the vertical length in this interval is 0.125.
Then the area of a rectangle is:

Where l is the length and w is the width.
In this case we have to:


So

