Answer:the first one
Step-by-step explanation:
i did the math
Answer:
Here are some screenshots from my study guides on this, maybe they can help you.
9x - 3(x + 2) + 7
Multiply the bracket by -3
(-3)(x)=-3x
(-3)(2)=-6
9x-3x-6+7
Answer: 6x+1
Answer: (36.7, 39.3)
Step-by-step explanation:
Confidence interval for population mean:
, where n= sample size, = sample mean, = population standard deviation, = critical z value.
Given: n= 40 ,
Critical z-value for 90% confidence = 1.645
Then, required confidence interval:
Hence, a 90% Confidence Interval = (36.7, 39.3)
She would have 46 squares by Friday if we are counting Friday of course :)