You are given
z+9/2 = -3. You are required to get the value of z. Since the equation is an example
of an equality, you can easily get the value of z. The solution of the problem
is,
Z + 9/2 = -3
Z = -3 – 9/2
<u>Z = -15/2
or -7.5</u>
<span>There given
choices does not contain the correct answer.</span>
ANSWER

EXPLANATION
The given function is

We need to find the inverse of this function,
Let

We interchange x an y to obtain,

We solve for y now to obtain,

We divide through by m to get,

Hence the inverse function is ,

For this inverse to exist, the denominator must not be equal to zero,
Thus

The correct answer is A.
Cos A will be 60°.
Because When, cos is 1/2 then theta or angle is degree 60°
The area of a triangle is .5*b*h = .5x^2
.5x^2 = 27 so
x^2 = 54
x = sqrt(54) = 7.3
X represent the number of laps Marcy swam, 1 1/4x represent the number of times Toni swam.
20 + 0.80(1 1/4x) + 15 + 0.85x = 257
20 + x + 15 + 0.85x = 257
1.85x + 35 = 257
Required equation is 1.85x + 35 = 257