The appropriate formula is
... z = (x - μ)/σ
Solving for x gives
... x = μ + z·σ
Substituting the given values lets you find x:
... x = 50 + 1.5·10
... x = 65
Let

be the mean and

the standard deviation.
Joe's score tells you that

, while Jon's score says

. Solve this to get

and

.
Answer:
d a m i dont even know this
Step-by-step explanation:
Answer:
C. y = 2x² +8x +6
Step-by-step explanation:
Reflecting f(x) across the y-axis changes the sign of x, so the new function is ...
f(-x)
Vertical scaling by a factor of "a" multiplies the function value by "a", so the new function is ...
a·f(x)
Doing both gives you ...
y = a·f(-x)
y = ax² +4ax +3a
None of the answer choices look like this. However, they match this if a=2:
y = 2x² +8x +6
Answer:
Travis
Step-by-step explanation:
Travis has previously shown himself to be faster than Wayne, thus he is most likely to still be faster.