400 -21 = 379
The answer is 21. 21 X 21=441 and that's between 400 and 450
84
7x3 = 21 All numbers from 1-400 (399 total) that are factors of 21: 399/21 = 19
400 / 21 = 19 gallons.19 x 4.00 = $76.00
9
10
8,400 miles.
400 / 2 * (10 + 11) 200 * 21 = 4.200
21% of 400 = 84 To solve this problem, you can either set up an equation or think it through and save some paper and time. 1. Setup 21 84 --- = --- 100 x 2. Remove denominators (by multiplying both sides by each) 21*x = 100*84 or 21x = 8400 3. Solve for x by dividing each side by 21 x = 8400/21 x = 400 The way I quickly thought through the answer was to consider what 21% means: 21/100. So, the ratio between 21 and 100 needs to be applied to 84. I did this: 100/21 = 4.76 4.76 * 84 = 400 If that's more than you were looking for, sorry, but the answer is 400.
100-400 or so
50-400 usd
210.