Gayle buys 8 biros for £3.

three of them are black.

the others are red.

each red biro costs 45p.

hat is the cost of one black biro?

You flip a coin twice. Find the probability that at least one of the tosses showed heads

Which statement best describes the function below? f (x) = 2x^2-3x+1 A. It is not a function B. It is a one to one function c. It is a many to one function. D. If fails the vertical line test.

Among a large group of patients recovering from shoulder injuries, it is found that 22% Visit both a physical therapist and a chiropractor, whereas 12% visit neither of these. The probability that a patient visits a chiropractor exceeds by 0.

In a recent poll of 2,000 household, 29% had pets. how many households did not have pets?

Where is the number 4 - 8 located on a horizontal number line? 4 units to the left of 4 4 units to the right of 4 8 units to the left of 4 8 units to the right of 4

What is the domain of f (x) = cos (x) ?

Mike and Kim invest $14,000 in equipment to print yearbooks for schools. Each yearbook costs $7 to print and sells for $35. How many yearbooks must they sell before their business breaks even?

What is the solution to the system of equations? Use the substitution method. j + k = 3 j - k = 7 A. The solution is (8, 1) B. The solution is (5, - 2) C. There is no solution. D. There are an infinite number of solutions.

30% of what number is 10.2

Long division 19 divide 23.94