Plug in 3 for y
8(3)^2-(3)-8
8(9)-3-8
72-3-8 = 61
Answer:
9 m
Step-by-step explanation:
Suppose AB is the ladder. AC is the height of the window above the ground and BC is the distance of the foot of ladder from the wall.
The triangle ABC is right angled at C.
∴ AB² = AC² + BC²
=> 15² = 12² + x²
=> 225 - 144= x²
=> 81 = x²
=> 9 = x
- Hence, distance of the foot of the ladder from the wall is 9 m.
Answer:
16.) second choice: (5,-6)
17.) third choice: (-10) (-8) (-5) (0) (1)
18.) fourth choice: (.18) (0.4) (1/4) (227)
Write the problem: 2x^2+3x-y-4y^2
Substitute x and y: 2(2)^2+3(2)-(-4)-4(-4)^2
Exponents and Multiplication: 8+6+4-64
Add and Subtract: -46
Your Answer is -46