21 x 4 = 84
500 x .4 = 200
x/4 + 5 = -1 (4)x/4 +(4)5 = -1 x+20 = -1 -20 -20 x= -21 x= -21
4 x 21 = 84 = (8 x 10) + (4 x 1)
x-3-7x=21 -6x=21+3 6x=-24 x=-4
21 x 4 = 84
500 x .4 = 200
To find 21 percent of a number, multiply the number by 0.21. In this instance, 0.21 x 500 = 105. Therefore, 21 percent of 500 is equal to 105.
Let's call "a number" x. 500 less than 4 times x would be 4x - 500.(Take 4 times x, and then subtract 500 to make it 500 less.)
Here you go --500 x 500 = 250,000 (5x5 + 4 zeros)250,000 x 500 = 125,000,000 (25x5 + 4+2= 6 zeros)
21 x 4 = 84
0.04 x 4 500 000 = 180 000
x/4 + 5 = -1 (4)x/4 +(4)5 = -1 x+20 = -1 -20 -20 x= -21 x= -21
4 x 21 = 84 = (8 x 10) + (4 x 1)
x2 + 8x - 5 = 0 ∴ x2 + 8x + 16 = 21 ∴ (x + 4)2 = 21 ∴ x + 4 = ± √21 ∴ x = -4 ± √21
The factor pairs of 500 are 1 x 500, 2 x 250, 4 x 125, 5 x 100, 10 x 50, and 20 x 25
Simple interest, 500 + (5 x 5 x 4) = 600. Compound 500 x 1.04^5 = 632.66