Write the following problem as a pair of simultaneous equations and solve:
a) find two numbers whose difference is 5 and whose sum is 23.
b) a rectangular house has a total perimeter of 34 metres and the width is 5 metres less than the length. what are the dimensions of the house?
c) if two chupa chups and three wizz fizzes cost $2.55, but 5 chupa chups and seven wizz fizzes cost $6.10, find the price of each type of lolly.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2