Tina weighs 8.3 kg. Her older brother is 4 times as heavy as Tina. How much does her older brother weigh?

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Find cot x if sin x cot x csc x = √2

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?