Answer:
1. 12y+20
2.
-18c
3. 18d-12
4. x=9
Step-by-step explanation
Hope this helps. I'm very sorry if I'm wrong
Answer:5 million
Step-by-step explanation: Because 300 thousand is below 500 thousand so if its below 500 thousand it cant round up it rounds down.
Answer:
The number is 529 because is you square 23 it will become 529 which will then become 23 is you square root 529. (Hope this makes sense)
Step-by-step explanation:
Juan's time = x
Yumi's time = x + 2
Yumi's distance = 3 miles
Juan's distance = 2 miles
Rate = distance/time
Juan's rate = 2/x
Yumi's rate = 3/(x + 2)
The rates are equal so:
2/x = 3/(x + 2)
2x + 4 = 3x
x = 4 hours
Yumi's time = 4 + 2 = 6 hours
The answer is D.
Answer:
the 95% confidence interval to estimate the population mean is between 1.62 and 6.50
Step-by-step explanation:
given data
distribution = 4.5, 6.4, 2.3, 1.8, 5.3
so n = 5
confidence interval = 95%
to find out
the population mean is between
solution
first we calculate the mean i.e.
mean =
mean = 4.5+ 6.4+ 2.3+ 1.8+ 5.3 / 5
mean = 4.06
now we calculate the standard deviation i.e.
standard deviation = 
standard deviation = 
standard deviation = 
standard deviation = 
standard deviation = 2.226544
so 95 % confidence interval is i.e. mean +/- t(5) * standard deviation/ 
here t(5) will be 2.45
so
95 % confidence interval= 4.06 +/- 2.45 * 2.226 / 
95 % confidence interval= 1.62 and 6.50