If 10 percent of 50 percent of a number is 30 less than one-quarter of the number, what is the number?

120
160
150
100
130

i'm bad with problems like this, ?

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?