On level ground, a vertical rod 12 feet tall casts a shadow 4 feet long, and at the same time a nearby vertical flagpole casts a shadow 12 feet long. How many feet tall is the flagpole?
36 feet
200
h squared - 9= 0. Solve
h = -3, 3
200
2t2 + 15 = 6t2 - 5t. Solve.
t= -3+-
√ 105 = (2s-12)2/6
200
5
√ x + 15 = 30
9
200
g(x)= x squared - 2. Is this the inverse of f(x) = 1/4x + 6?
No
200
A ramp for loading trucks is 13 feet long and covers 12 feet along the level ground. How many feet high is the highest point on the ramp?
5 feet.
300
d2 + 10d + 18= -7. Solve.
x = -5
300
-6a2 + 3a - 13
0
300
if y=3
√ X + 4
√ X then 3y
√ X = ?
21x
300
Find the inverse of f={(1,3), (2, -5), (3, 6)}.
f-1 = {(3,1), (-5, 2), (6, 3)}
300
In the right triangle on the board, which of the following answers is true?
A) cos A= 12/13
B) sin A = 12/13
C) cos A= 13/12
sin A = 12/13
400
4x2 - 46 = 3. Solve.
x= -7/2, 7/2
400
3t2 + 8t + 5 = -2t2. Solve
x= 3/4
400
√ 54 = x
√ y . If x and y are both positive integers, what is the value of xy?
18
400
Find the inverse of f(x)= 3x+4/7
f-1(x)= 7x+4/3
400
The building on the board casts a shadow of 24 yards long, and the angle of elevation from the top to the top of the building has a sine of 4/5. What is the height of the building in yards?
32
500
12h2 + 40h + 32 = =. Solve.
x = -4/3, -2
500
10x2 - 11x + 9 = 13x - 6x2
t = -4 +- 3i/ 5
500
Which of the following complex numbers is a sum of
√ -72 and
√ -8 ?
6i
√ 2
8i
√ 2
12i
√ 2
8i
√ 2
500
Graph the inverse of f(x)=4x-2
Equation of Line: 1/4x + 3
500
A right triangle has its sides measured in the same unit of length is shown on the board. For such a triangle, (tanA)(sinB)= ?