= x·[2(x²- 4x + 4) + 3(x² + 6x + 9) - x² + 5x]
= x(2x² - 8x + 8 + 3x² + 18x + 27 - x² + 5x)
= x(4x² + 15x + 35)
First question:
1. Set equations equal to each other so 5x-9=2x+6
2. Put x's on one side so that 3x=15
3. Divide by 3 so that x=15
4. Substitute 15 in for x so that y=2(15)+6
5. Solve for y so that y=36
6. Thus the equations intersect at (15,36)
Second question:
1. Since for lines y=mx+b, and m=slope=3 you only need to write an equation with slope 3
2. y=3x+b, b can be any number
Answer:
0
Step-by-step explanation:
Given
- 0.4(3x - 2) + ← substitute x = 4 into the expression
= - 0.4(3(4) - 2) +
= - 0.4(12 - 2) +
= - 0.4(10) +
= - 4 + 4 = 0
Answer:
the answes are C and D
Step-by-step explanation: