y varies directly as x
y=kx, where k is any constant
y = 4 when x=-2
4 = k (-2)
4 =-2k
k=-2
Therefore, y=-2x
When x=30
y = -2(30) = -60
mensos yo no me la seee
The answer is x=10. If: x=20 y=8 z=4 then: y=8/2=4 z=4*2=8 since x varies directly with y, meaning whatever happens to y, happens to x, so if y was divided by 2, then x should be divided by 2. After all, the inverse of division is multiplication.
is it 5/8x or 5x/8 let me solve both ways for 5/8x = 30 then x = 1/48 for 5x/8 = 30 x = 48
x = 75
As x ∝ yz2 then x = kyz2 where k is a constant. Substituting the given figures, 40 = k*20*22 = 80k Then k = ½ and the formula is, x = ½yz2 So, x = ½ * 30 *32 = 135
49 - 30 equals = 19
x equals 6 5 times 6 equals 30
If you mean adding in groups, I suppose you could break 34 into 30 and 4. Then you could add 9 to 4 to get 12, and then perhaps more easily add 13 and 30 to get 43.
"30 percent of 122 equals 85.4" is false. 30 percent of 122 equals 36.6.
120 divided by 30 equals four.
5.477225575 squared equals 30.
30/1 is one improper fraction that equals 30.