How do I write two hundred fifty million in expanded notation using powers of ten

Brian has a model collection of cars, trains, amd fire engines. He has 28 cars. The number of fire engines is 2 times the number of trains. He has 67 models in all. How many of each type of model does he have?

What is the area of the figure? 5 yd 3yd 6 yd

What is (x+8) (x+3) simplify

What is the answer to 5-20/3?

If you take a number, times by 4 then add 7. You get the same as if you took the number, times by 8 then subtract 5. What is the number?

There are 25 elementary students, 55 middle school students, and 60 high school students that are in a school district's peer counseling program.

Joni put $200 in an interest-bearing account with an annual compound interest rate of 5%. Joni determined that after 3 years, she will have a total balance of $230. Her work is shown below. Step 1: P = 200, r = 5, t = 3 Step 2: I = 200 ∙ 0.

What is (13x + 9x) + (17k + 6k), simplified?

Which ordered pair represents the solution to the system of equations? {4x-2y=18-3x-4y=-8 (4, - 1) (5, 1) (-1, 4) (43, 1)

532.0419 what is the place values