Answer:84
Step-by-step explanation:because 7x12=84
8x²-18xy-5y²
8x²+2xy-20xy-5y²
2x(4x+y) -5y (4x+y)
= (2x-5y) (4x+y)
h has infinitely many solutions.
The line we are searching for has the same slope because both lines are parallel.
The given equation y = 2x + 8 has a slope of 2.
We need the point-slope formula, the slope 2 andbthe given point.
y - y1 = m(x - x1)
y - 2 = 2(x -(-3))
y - 2 = 2(x + 3)
y - 2 = 2x + 6
We now solve for y.
y = 2x + 6 + 2
The equation we want is y = 2x + 8.
Answer:
f(-2) = 54
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
Step-by-step explanation:
<u>Step 1: Define</u>
f(x) = 3x(x² + 4x - 5)
f(-2) is x = -2
<u>Step 2: Evaluate</u>
- Substitute in <em>x </em>[Function]: f(-2) = 3(-2)[(-2)² + 4(-2) - 5]
- [Brackets] Evaluate exponents: f(-2) = 3(-2)[4 + 4(-2) - 5]
- [Brackets] Multiply: f(-2) = 3(-2)[4 - 8 - 5]
- [Brackets] Subtract: f(-2) = 3(-2)[-4 - 5]
- [Brackets] Subtract: f(-2) = 3(-2)(-9)
- Multiply: f(-2) = -6(-9)
- Multiply: f(-2) = 54
