Answer: 25% of 300 is x x is 75
Step-by-step explanation:
Answer: Exam A
Step-by-step explanation:
We must analyze how far are you from the mean in both cases, where the "step" that we will use to measure is the standard deviation.
In exam A, the mean is 20.5 and the standard deviation is 4.9.
If you scored a 27; then you need to see:
20.5 + 4.9 = 25.4
20.5 + 4.9 + 4.9 = 30.3
So you are within two times the standard deviation (more than the mean).
In the B exam, the mean is 1022 and the standard deviation is 214, where you scored 1209.
1022 + 214 = 1236
So in this exam, you are by one standard deviation away from the media.
With this, you can see that you did score better in exam A.
Answer:
40
Step-by-step explanation:
10/x = 25/100
Cross multiply 10 and 100 = 1000.
Then, divide 1000 by 25 = 40.
10/40 = 0.25 = 25%
Remember you can do ANYTHING to an equation as long as you do it to both sides
2(x+3)-5=5x+4
distribute 2 to x+3
2(x+3)=2x+6
now we have
2x+6-5=5x+4
combine like terms
2x+1=5x+4
minus 2x from both sides (subtraction property of equality)
2x-2x+1=5x-2x+4
addative inverse
0+1=3x+4
zero addition property
1=3x+4
minus 4 from both sides
1-4=3x+4-4
addative inverse
-3=3x+0
zero addition property
-3=3x
diide both sides by 3
-3/3=3x/3
multilicative inverse
-1=1x
one identity property of multiplication
-1=x
x=-1
Answer:
x=25
Step-by-step explanation:only answer that makes any sense
