Round 489 to the nearest ten

Researchers are interested in studying how to maintain weight loss. Based on a survey of almost 3000 adults, researchers Wyatt et al.

Gina looks at the architectural plan of a four-walled room in which the walls meet each other at right angles. The length of one wall in the plan is 17 inches. The length of the diagonal of the floor of the room in the plan is approximately 18.

D + (-d) = What if the answer?

Explain how to use the break apart strategy to find 247+358

There is a bag filled with 5 blue, 6 red and 2 green marbles. A marble is taken at random from the bag, the colour is noted and then it is not replaced. Another marble is taken at random. What is the probability of getting 2 greens? hjelp

The perfect squares between 21 and 52

I need to make this expression true by using grouping symbols. 2x2+3^2 - 4+3x5

Write these decimal fractions in words 42/100

Andrew has only one white and black socks in a drawer. The probability of him pulling out a black sock is 1/5. What is the likelihood of Andrew randomly pulling out a white sock?

Which is the largest? 76%,4/5,.77