PLEASE HELP ASAP!! Explain how you solve these problems:
7. A seven-digit telephone number has two identical missing digits so that it
reads 276-9?4?. If the seven-digit number is divisible by 6, what is the value of that missing digit?
8. How many different 4 digit numbers can be formed using the digits 2,4,5,6, and 7 such that no
digits repeat and the number is divisible by 4.
9. A and B are 2 non- zero digits for which A468B05 is a number divisible by 11. What is A + B?
10. If the four digit number 57D2 is divisibility by 18, what is D?

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?

The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.