Answer:
c. 81
Step-by-step explanation:
(x^3)^1/6= √81
x^(3*1/6)= √81
x^(1/2)= √81
√x=√81
x=81
Answer:
it is A
Step-by-step explanation:
Answer: 28 color sets were sold
Step-by-step explanation:
Let x represent the number of black-and - white models that were sold.
Let y represent the number of color sets that were sold.
An appliance dealer sold 40 tv sets during a special sale. Some of the sets were black-and - white models while the rest were color sets.. It means that
x + y = 40
Black-and - white models each sold for $119. Color sets sold at $319each. The sale brought in $10,360. It means that
119x + 319y = 10360 - - - - - -- - - - - -1
Substituting x = 40 - y into equation 1, it becomes
119(40 - y) + 319y = 10360
4760 - 119y + 319y = 10360
- 119y + 319y = 10360 - 4760
200y = 5600
y = 5600/200
y = 28
Cos(arcsin(u)) = √(1 - u²)
_____
You want cos(α) where sin(α) = u.
You know that
cos(α)² + sin(α)² = 1
cos(α)² = 1 - sin(α)² = 1 - u²
cos(α) = √(1 - u²)
Gradient (m) = change in y/change in x
-2-5/0–2 = 3.5
gradient (m) = 3.5
Now evaluate one of the coordinates and the gradient in the equation
y = mx + c
-2 = 3.5(0) + c
c = -2
so the answer is
y = 3.5x -2
