Two plumbers make house calls. One charges $105 for a visit plus $30 per hour of work. The other charges $65 per visit plus $40 per hour of work. For how
many hours of work do the two plumbers charge the same?

Step-by-step explanation:

plumber ones equation: y = 30x + 105

plumber two: y = 40x + 65

set the two equations equal to each other

30x + 105 = 40x + 65

solve for x

40 = 10x

4 = x

after 4 hours they will charge the same

109 is the nearest whole number/final answer! : )

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.