two rulers and one pencil cost £2.40 five rulers and one pencil cost £5.10 work out the cost of a ruler and the cost of a pencil.

Mrs Li is x years old Mr Li is 6 years older than Mrs Li. David is one third of Mr Li. Write an expression in terms of x for Davids age and the Sum of their 3 ages giving your answer in simplest form.

What two numbers multiplied by each other make - 12, but added together make 4?

A bank loans a customer $66,000 for a period of 5 years. the simple interest rate of the loan is 10.5%. what is the total amount that the customer will need to pay the bank over the 5 years?

Determine which ordered pair is a solution of y=8x. A. (0,8) B. (-1,8) C. (1.5,10) D. (2,16)

A circle has a radius of 10 cm what is the circumference

Choose the smallest set of which {5,2,23} is a subset

Round both numbers to the nearest whole number and estimate the result 6.8*7.9, 7.6*7.5, 0.9*44, 0.2*44

The sum of a 3-digit number and a 1-digit number is 217. the product of the numbers is 642. if one number is between 200 and 225, what are the numbers

Counting codes. How many 3-digit telephone area codes are possible if the first digit cannot be 0 or 1?

The equation P=28+2.54w models the relation between the amount of Randy's monthly water bill payment, P, in dollars, and the number of units of water, w, used. Interpret the P-intercept of the equation.