Answer:
59.4 mph
Step-by-step explanation:
Y=3x-23
.
Hope this helps :)
8x-5y because 7x plus x is 8x and -6y+y is 5y
To find the standard error, divide the standard deviation by the square root of the sample size
standard deviation = 7.5
sample size = 25......sqrt 25 = 5
standard error = 7.5 / 5 = 1.5 <==
Your equation would be 2x - 12 + 3x - 15 = 23
Combine like terms and solve for x