Rewriting this expression could result in: 6(2x + 3).
Answer:
78 miles per hour
Step-by-step explanation:
Formula for speed is Distance divided by Time. (D/T)
The distance between Station A and Station C can be found be adding the distance from A to B and B to C. (20.8 Miles)
Same concept would go for the time.
Time to get from A to B added with B to C. (16 Minutes)
However, the time is in minutes and the question calls for hours. Divide 16 by 60, you get around 0.27.
20.8 divided by 0.27 would be around 77.9, or 78 miles per hour.
Hope this helps :)
Kong took
15% fewer seconds than Nolan took. So Kong took
100%−15%=85%
85/.85=.85*?/.85
100=?
Which means that Nolan took 100 seconds.
This is all from Khan Academy so it's correct!!
Hope this helps!!
<u>Answer</u><u> </u><u>:</u><u>-</u>
13) x = 6
14) PQ = 31
15 ) PR = 38
16 ) x = 13
Step-by-step explanation:
[ Refer to the attached file ]
First Part:
For every parenthesis with a plus sign to its left, you can eliminate the parenthesis (take into account that plus×minus=minus)
a + a - b - a + b
Then you add like terms. This means you add/subtract a with a and same with b and b (I'll organize the terms in alphabetical order but it's not neccesary)
a + a - a - b + b
Since a - a =0 and b - b = 0,
a + 0 + 0
Answer: a
Second part
Since you have a minus to the left of a parenthesis, you have to change the signs of all the terms inside the parenthesis before you eliminate the parenthesis.
Answer: 2a^2