Answer:
Step-by-step explanation:
50
The correct answer for the question that is being presented above is this one: "<span>C) </span>4.2 inches." Bella has sampled the heights of 30 students at Ridgemont High and obtained a mean of 64.2 inches. He constructs a 90% confidence interval, which turns out to be (61.0, 67.4). The margin of error is <span>C) </span><span>4.2 inches </span>
Since in 1990 there are 28%, we need to figure out when it gets to 31%. In addition, since it increases by 0.6% every year, we can say that 0.6x+28 (since 28 is the base value) is the percentage of babies born in wedlock every year. Therefore, to get 0.6x+28=31, we subtract 28 from both sides to get 0.6x=3
Dividing both sides by 0.6, we get x=5=the amount of years it takes to get 31% of babies born in wedlock. Since 1990 is the base value (we start from there!), we add 5 to that to get 1990+5=1995 as the yar
Answer:
12 nickels, 9 quarters, 15 dimes
Step-by-step explanation:
Let's call the number of nickels n, the number of dimes d, and the number of quarters q. Now, we can set up the following equations:
n+d+q=36
q=n-3
d=q+6
Now, we can do some substitution:
d=(n-3)+6=n+3
Plugging this into the first equation, you get:
n+(n+3)+(n-3)=36
3n=36
n=12
There are twelve nickels, meaning that there are 9 quarters and 15 dimes. Hope this helps!
Answer:
x=7 1/6
Step-by-step explanation:
