Answer= y = 9
Simplify both sides of the equation
4y-40=-4
add 40 to both sides
4y - 40 + 40=-4 + 40
4y= 36
divide both sides by 4
4y/4 = 36/4
36/4 = y=9
90 ÷ 2 is the same as 1/2 of 90.
Either way you get 45.
Answer:
The confidence interval is 
Step-by-step explanation:
From the question we are told
The sample proportion 
The margin of error is 
The confidence interval for p is mathematically represented as

=> 
=> 
Answer:
D
Step-by-step explanation:
It seems to be A but it's not A because the ratio of their corresponding sides is 1:2
Rest of the working in the attached file
Answer:
12 cups
Step-by-step explanation:
So we can just divide 9 by 3, which equals 3.
So we know 1/4 of the amount is 3 cups, so we can just do 3 x 4 which equals 12. And this is the answer!
Hope this helps you!