When wiring a house, an electrician knows that the time she will take is given
by the formula
time = 2 hours + 12 minutes per lightswitch
she charges her customers a call-out fee of £35, plus £30 per hour.
how much should a customer be charged for wiring a house with
10 lightswitches?

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.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?