Explain howyou wouldestimateto subtract 189 from 643

The tens digit of a two digit number is twice the units digit. If the digits are reversed, the new number is 36 less than the original number. Find the number.

M over 4 = - 13 what does m = ? ... ?

What is the surface area of this right rectangular prism? Enter your answer in the box. in² A rectangular prism with a length of 3 inches, a width of 1 inch, and a height of 2 inches.

A triangle has two angles measuring 90 degrees and 50 degrees, calculate the third angle of the triangle. a. 50 b. 40 c. 45 d. 75

Martina begins a dive at sea level. She dives down 20 feet, and then rises 7 feet. She dives again, going down 9 more feet. How far below sea level is Martina?

Millie went shopping and took £60 to spend. she spent 1/2 of her money on a pair of shoes, she then spent 2/3 of what she had left on a pair of jeans. how much money did she have left at the end of her shopping trip?

Circle two addends to add first. write the sum 7,3,3

TK-119 has a 20% salt solution in it and contains 27,000 gallons. How many gallons of the solution are salt?

What is the square root of 517? And how do I show my work.

A bowl at a party holds 3 gallons (384 cups) of punch. How many 1 1/2 cup glass can be served from a full punch bowl?