Answers:
- Sam's current age = 24
- The mother's current age = 48
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Explanation:
s = Sam's age right now
2s = the mother's age right now, since she is twice as old as Sam currently.
In 12 years time, Sam will be s+12 years old.
12 years ago from this current year, the mother was 2s-12 years old.
Since we're told these future and past ages line up, this means s+12 and 2s-12 are the same value
Set the expressions equal to one another and solve for s.
s+12 = 2s-12
s-2s = -12-12
-s = -24
s = 24
Sam is currently 24 years old.
His mother is currently 2s = 2*24 = 48 years old.
12 years ago, his mother was 2s-12 = 48-12 = 36 years old.
12 years from now, Sam will be s+12 = 24+12 = 36 years old.
Since we get 36 each time, this confirms we have the correct answers.
Answer:
81.82%
Step-by-step explanation:
First we need to convert the X score to Z score using the formula;
Z = X-µ/σ
If X = 225.76
Z = 225.76-256.43/27.11
Z = -30.67/27.11
Z = -1.1313
Similarly if X = 300.35
Z = 300.35-256.43/27.11
Z = 43.92/27.11
Z = 1.6201
Hence the required z score is P(-1.1313 ≤ Z ≤ 1.6201)
Checking the normal distribution table;
P( Z ≤ 1.6201) = 0.9474 = 94.74%
P(Z ≤ -1.1313) = 0.1292 = 12.92%
P(-1.1313 ≤ Z ≤ 1.6201) = 94.74 - 12.92
P(-1.1313 ≤ Z ≤ 1.6201) = 81.82%
The answer should be true hope this helps have a good day
Answer: It would be Option B. (11,337)
Took the quiz and got it right on edgen
Step-by-step explanation:
Answer:
-9.7
Step-by-step explanation:
we can do the opposite of everything that was done to get the resulting difference
so......
-8.4+6.4=-2
-2x19.4=-38.8
-38.8/4=-9.7
and to double check.......
-9.7x4=-38.8
-38.8/19.4=-2
-2-6.4=-8.4