Two points A and B, are plotted on a centimeter grid. A has cordinates (2,1) and B has cordinates (8,5). a. work out the cordinates of the mis point of the line joining A and B.
b. use Pythagoras Theorem to work out the length of AB. Give your answers to correct 3 significant figures.

Solve the system by the elimination method. 2x + y - 4 = 0 2x - y - 4 = 0 when you eliminate y, what is the resulting equation? a.x = 0 b.4x = -8 c.4x = 8

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?