Solve each equation mentally.

16. 9b = 36 17. 11w = 66 18. 80 = 10d

19. 45 : m = 5 20. g : 4 = 12 21. 26 : k = 2

The diameter of a round dinner plate is 10 inches whats the area of thw plate

1. Estimate. First round to the nearest whole number (show ur work) 9.8*2.2= 2. find the sum 109.526+36.42=

Vardan thought of a prime three-digit number, all the digits of which are different. What is the last digit, if it is known that the last digit is equal to the sum of the first two digits?

Find the volume of the cylinder. Round your answer to the nearest tenth. radius is 4 and your height is 8

Which expression is equivalent to the given expression? 19x-23x19x-23x x (23-19) x (23-19) x (19-23) x (19-23) 19x (1-23x) 19x (1-23x) 19 (x-23)

What is the ratio of 30 to 66 in simplest form

The vertices of a quadrilateral are A (-5,3), B (2,2), C (4,-3) and D (-2,-2). How can you use slope to determine whether the quadrilateral is a parallelogram? Is it a Parallelogram? Justify your answer.

Charlie is at a small Airfield watching for the approach of a small plane with engine trouble he sees a plane at an angle of elevation of 32 at the same time the pilot radius radios Charlie and reports a plane's altitude is 1700 ft Charlie's eyes

Y=k/x, when y=2, x=5 a) Calculate the value of k b) Calculate the value of x when y=0.5.

Isabella spends $4.87 on paintbrushes and paint. How many of each does she buy