Answer:
x = -4
Step-by-step explanation:
3x + 4y = -16
X = 4y
3(4y) +4y = -16
=> 12y + 4y = -16
=> 16y = -16
=> y = -1
3x + 4(-1) = -16
=> 3x -4 = -16
=> 3x = -12
=> x = -4
Hope this helps! :3
plz mark as brainliest!
9514 1404 393
Answer:
13120
Step-by-step explanation:
The sum of terms of a geometric series is ...
Sn = a1·(r^n -1)/(r -1)
You have n=8, a1=4, r=3, so the sum is ...
S8 = 4·(3^8 -1)/(3 -1) = 2(3^8 -1) = 13,120
$6.50 x 8 = $52 which is the hourly rate for her 8 hours
Then
$0.45 x 74 = 33.3
$33.3 + $52 = $85.30
If your asking to get dead on it's the closest I came because it would be under or over the $85
Answer:
The standard deviation of this probability distribution is 1.2.
Step-by-step explanation:
We have that:
P(X = 0) = 0.25
P(X = 1) = 0.3
P(X = 2) = 0.1
P(X = 3) = 0.35
Mean:
Each value multiplied by its probability. So
Variance:
Sum of the squares of the values subtracted from the mean, and multiplied by its probability.
Standard deviation:
Square root of the variance. So
The standard deviation of this probability distribution is 1.2.
Answer:
I'm bad at math sorry I need help with social studies. helppppppp
Step-by-step explanation:
HELP
