If the original distance is x, then twice the original distance is 2x.
6 less than something means minus six, or -6.
So the answer would be A) 2x-6
Answer:Andrew tarda 19 minutos en ducharse y desayunar
Explicación paso a paso:
720 seg de ducharse + 420 segundos de su desayuno dan igual a 1140 segudnos
a este numero de segundos hay que pasarlo a minutos. El resultado es 19 minutos que son 1140 segundos
Step-by-step explanation:
Answer: B
Step-by-step explanation:
Answer:
1250 m²
Step-by-step explanation:
Let x and y denote the sides of the rectangular research plot.
Thus, area is;
A = xy
Now, we are told that end of the plot already has an erected wall. This means we are left with 3 sides to work with.
Thus, if y is the erected wall, and we are using 100m wire for the remaining sides, it means;
2x + y = 100
Thus, y = 100 - 2x
Since A = xy
We have; A = x(100 - 2x)
A = 100x - 2x²
At maximum area, dA/dx = 0.thus;
dA/dx = 100 - 4x
-4x + 100 = 0
4x = 100
x = 100/4
x = 25
Let's confirm if it is maximum from d²A/dx²
d²A/dx² = -4. This is less than 0 and thus it's maximum.
Let's plug in 25 for x in the area equation;
A_max = 25(100 - 2(25))
A_max = 1250 m²
2x^2+9x-6 i found this by subtracting 3x^2+7x from the other equation
