Use Heron’s formula to find the area of the triangle with sides of length 12, 18, and 24.
(a) 104.6
(b) 204.6
(c) 206.4
(d) 401.2
(e) none of these
(a) 104.6
Mathematics
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Integrate the function f over the given region.f(x, y) = 
over the region bounded by the x-axis, line 
and curve 
A. 6 B. 1 C. 7 D. 8
Mathematics
Evaluate the trigonometric function at the quadrantal angle, or state that the expression is undefined.csc ?
A. -1 B. 1 C. undefined D. 0
Mathematics
Solve the formula for the specified variable.a + b = s + r for r
A. r = s(a + b)
B. r = 
C. r = 
+ b
D. r = a + b - s
Mathematics
Write the English sentence as an equation in two variables. Then graph the equation.The y-value is three more than four times the x-value.
A. y = -4x - 3
B. y = 4x + 3
C. y = 4x - 3
D. y = -4x + 3
Mathematics