-3^6 = -729
-729 +(-4+7)(2)
-729 +(3)(2)
-729 + 6
-723
<em>hope it helps :)</em>
(ps: the result of -3^6 is not +729, the expression that would give this result is (-3)^6
Answer:
80 hours for 2 workers to build 8 cars
Step-by-step explanation:
2 cars / 8w *5 hr = 2 cars / 40 hrs 1 car takes 20 hrs
8 cars * 20 hours = 160 hours required
two workers split this time 160/2 = 80 hours
Answer:
B
Step-by-step explanation:
We'll use Natasha's location as 0 on a number line. To the left of her, 51/20 would be negative and 25/4 would be positive.
To find how far apart the dogs are, we would need to add the absolute value of each number:
|-51/20| + |25/4| however, this can also be rewritten as:
25/4 - (-51/20)
Let's go through these, sentence by sentence:
a. <em>Henry is driving at a constant speed.</em>
If the y-axis represents the speed of Henry's car, this portion of the graph should be a straight horizontal line, as his speed doesn't change at all. This already eliminates the first and second options.
<em>He then slows down to pass an accident. After passing it, he goes back to his original speed and continues driving at that speed</em>.
We should see a downward-sloped line segment during the period when he slows down, and then an upward-sloped line segment during the time where he speeds up. Graphically, this would look like a V. Finally, the graph would again become a straight horizontal line as he returned to and maintained his original speed. Graph #4 is the only one which represents this description.
b. <em>Teresa is driving to work. She drives at a constant speed for several miles, then stops to pick up breakfast</em>.
On all of the graphs of this situation, the y-axis represents Teresa's <em>distance to work</em>. We have to be careful here, because the further she drives, <em>the further down the graph goes</em>. The y-coordinate starts at some positive fixed position (the total distance to work) and works its way down to 0.
There's only one graph which represents this scenario - a downwards trend - and that's graph #3.
Hope you could get an idea from here.
Doubt clarification - use comment section.
