What is the expanded form of this number?

509.307

(5*100) + (9*1) + (3*110) + (7*11,000)

(5*100) + (9*10) + (3*110) + (7*11,000)

(5*100) + (9*10) + (3*1100) + (7*11,000)

(5*100) + (9*1) + (3*1100) + (7*11,000)

There are 84 new houses being built in a neighborhood. Last month, 1/3 of them were sold. This month, 5/7 of the remaining houses were sold. How many houses are left to be sold?

Is 80 a multiple of 4

Barbara has a part-time lawn-mowing job. The table below shows the amount of money Barbara earned for different numbers of hours of work: Barbara's Earnings from Lawn Mowing Number of Hours Worked Money Earned (dollars ) 5 40 6 48 8 56 Part A: What

A farmer has sheep and cattle in the ratio 8:3. How many sheep has the farmer if he has 180 cattle?

You are looking out your window in a skyscraper, and again your window is at a height of 450 feet above the ground.

What's the inequality of 4n-8<40

Fill in the blank to make the two fractions equivalent. 5/9 = / 36

Given that a, b, and c are non-zero real numbers and a + b ≠ 0, solve for x. ax + bx - c = 0

What value should be added to both sides of the equation X2 + 12 X + 6 equals - 5 to solve the question by completing the square

The cost y for a company to produce x T shirts is given by the equation y=15x+1500