15 x 4 is 60.
You can see this more clearly by thinking about time. 15 minutes is a quarter of an hour, there are 4 quarters in an hour, there are 60 minutes in an hour, 15 times 4 is 60.
2*(4*7 + 7*15 + 15*4) = 386 square units.
If you mean: x^2+15-3x then its value is 19 when x equals 4
First of all add all common factors. In par. (2x) + 15 + (2x) = 180 4x + 15 = 180 Divide 4x and 180 by 4. (4x/4) + 15 = (180/4) x + 15 = 45 Then subtract 15 to 15 and 45. x + (15-15) = (45-15) x = 30 Answer is X = 30.
It is: (15 times 7) + 4 = 109
If you mean the value of 15-2x when x is 2 then it is: 15-4 = 11
4 x 15 x 25 = 1,500.
When X = 4, 15X = 15 * X = 15 * 4 = 60
If x - (-15) = 11 then x = -4.
3/5 x 5/12 x 4/15 = 3 x 5 x 4/5 x 12 x 15= 5 x (3 x 4)/5 x 12 x 15= 1/15
4 x 15 + 9 = 69
[ (x - 4) / 15 ] / [(2x + 13) / 15] = (x - 4) / (2x + 13)
3.75 0.25 = 25/100 = 1/4 15 x 1/4 = 15/4 = 3.75
4x-15=1 15+1=16, 16/4=x=4 x=4
Expressed as a formula, this is equal to (15 + 4)/x.
x2 - 19x + 60 = x2 - 15x - 4x + 60 = x(x - 15) - 4(x - 15) = (x - 15)(x - 4)
4, 6 and 15 or 46 and 15 cos 4,6 and 15 LCM is 360 (4 x 6 x 15)
(7 - x/4) = 15 x/4 = 7 - 15 x/4 = -8 x = -32 Verification: 7 - ( -32/4) = 7 - (-8) = 7 + 8 = 15