Answer:
(√1 - a²)
Step-by-step explanation:
cos(sin⁻¹ a) = cos x°
sin x° = sin (sin⁻¹ a) = a
as shown in the attached picture
sin x° = a/1 cos x° = (√1 - a²) / 1 = (√1 - a²)
Answer:
x=-3, and y=2
Step-by-step explanation:
Since both equations are equal to y, set them equal to each other and solve for x, that way you can solve for y:
x+5=-2x-4
3x+5=-4
3x=-9
x=-3
Plugging in x=-3 into one of the original equations:
y = x + 5
y = -3 + 5
y = 2
Therefore, x=-3 and y=2. You can also write as the ordered pair (-3,2) since that's where the two equations would intercept on a graph.
A cubic function only has 3 solutions at which x = 0, never 4. For example the function y =

gives the solutions:
x = 0, x = -1 and x = -2
Answer:
72.91
Step-by-step explanation:
100% is 67.82
1% is 67.82/100 = 0.6782
100%+7.5%= 107.5%
so, multiply!
0.6782 x 107.5 = 72.9065
round it up to 72.91
Her profit is $4.80 :)
$7.20•2=$14.40
24 pens • $0.80 =$19.20
$19.20-$14.40=$4.80 profit :)