I will take M as molly and S as her sister
M=x-5
S=x
M+S=37
X-5+x=37
2x-5=37
Now you add 5 on both sides so you get 2x=37+5
-5 on other becomes 0 because when you add +5 and -5 get cancels out
So I am left with 2x=37+5
2x=42
Than you divide 2 on both side to get x alone so you are left with
X=(42/2)
X=21
Molly’s age equation is x-5
Now you plug x into the equation so you get
21-5
And that’s equal to 16
So Molly’s age is 16 years
Answer:
14
Step-by-step explanation:
Substitute -2 for x in the two places where x occurs:
8
(-2)^2 - ------- + 6 = 4 + 4 + 6 = 14
-2
Answer:
8x+11y
Step-by-step explanation:
add and subtract all the ones with the same variable
Answer:
Carrie won
Step-by-step explanation:
Carrie's mean 12,400 and standard deviation 1,500.
Vicki's mean 14,200 and standard deviation 2,000.
Z score is the distant a value is from the mean in terms of standard deviations.
x is the value
μ is the mean
σ is the standard deviation
Carrie's z-score:
Vicki's z-score:
Comparing z-score Carrie won the contest
