Which of the following equations is not equivalent to 7x = 21?

A. 2x = 6

B. 5x = 2

C. 2.2x = 6.6

D. 2x + 8 = 14

In the diagram shown, ABCE is a trapezium, AD is parallel to BC, DE = 4 cm, Area of ABCE = 60 cm?, Area of ABCD = 48 cm?. g cm Work out the values of fand g. You must show all your working.

Which equation represents h? (h = 19.5sin35°)

Tipton Tile has seen an increase in tile sales over the last few weeks. They sold 5,148 square feet of tile to 44 customers last week.

Simply the expression 2 (3n+4) - 2 (2n+5)

Carlton ran 7 3/4 miles in 52 7/10 minutes. what is his average pace per minute?

Water in a swimming pool is treated with two chemical mixed. In a ration of 5:4. The total volume of the chemicals is 48 litres. How much of each chemical is used?

A 0.01 probability that it will be 85 on Saturday

O custo mensal de um carro depende diretamente da kilometragem percorrida. Um motorista observou um gasto de R$380,00 para dirigir 480km em maio e um custo de R$460,00 para dirigir 800km no mês de junho.

There were 15 cars and 25 trucks in the parking garage. what is the ratio of cars to total vehicles

Solve the system of equations. y = 3x + 5 y = 8x + 3