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Earn +20 ptsQ: What is -9 x -2 -4?
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How can 9 times 4 help you find 9 times 8-?
Since 8 is 2 x 4, 9 x 8 is 2 x 9 x 4
How can you make 24 using numbers 9 4 8 2?
√9 x 2 x (8 - 4) = 3 x 2 x 4 = 24
What is the factor expression of x2-9x plus 4 equals 0?
That equation can not be factored. It can however be solved for x: x2 - 9x + 4 = 0 x2 - 9x + 81/4 = 81/4 - 4 (x - 9/2)2 = 81/4 - 16/4 (x - 9/2)2 = 65/4 x - 9/2 = ± √65 / 2 x = (9 ± √65) / 2
What two methods can be used to find the soution of the equation x plus 4 equals 13?
1) x+9=13 (subtract 9) x=4 2) x+9=13 (divide by 9) x/9+1=13/9 (use Pascals theorem of 1) (x+4)/2=4 x+4=8 x=4
What is 18 divided by 9 times 2?
18 ÷ 9 x 2 = (18 ÷ 9) x 2 = 2 x 2 = 4
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