X = 3 so 22 needstobe20characterslong
Okay. First off, let’s solve for the first two sides, since they are the same length. Set it up like this: 8x - 4 = 5x + 11. Subtract 5x from both sides to get 3x - 4 = 11. Next, add 4 to both sides to get 3x = 15. Now, divide each side by 3 to isolate the x and you get 5. Let’s plug in the values. 8 * 5 = 40 - 4 = 36. 5 * 5 = 25 + 11 = 36. There. x = 5. Now, let’s plug the 5 in to the other formula. 5 * 4 = 20. 20 - 2 = 18. There. BC is 18 units long.
Answer:
Step-by-step explanation:
The question makes sense for all values of x, but I imagine that is not exactly what you mean.
I think you mean for what values of x does the question produce a real square root?
The answer is as long as x + 2 does not drop below 0, the results will be real.
Put mathematically x ≥ -2 gives a real result. For now just don't try and take the square root of a minus number.
Pauline's average speed for this trip is 64 km/hr.
<em><u>Explanation</u></em>
First we will convert each 'minutes' into 'hours' . So......
40 minutes = 
and 23 minutes = 
Now, 
So, the distance traveled for first 40 minutes at 88 km/hr speed 
,
the distance traveled for next 40 minutes at 75 km/hr speed 
and
the distance traveled last 23 minutes at 49 km/hr speed 
So, <u>the total distance traveled </u>
She spends 17 minutes eating lunch and buying gas.
So, <u>the total time taken for the trip</u> 
Thus, Pauline's average speed for this trip = (Total distance / Total time) 
<em>(Rounded to the nearest km/hr)</em>
