Solve the system of equations using elimination. how many solutions does the system have? 15j + 12k = 18 5j + 4k = 6

observe that

15j + 12k = 18

3(5j + 4k = 6)

since the first equation is multiple of the second equation, then there are infinitely many solutions for the system

it is infinite

Step-by-step explanation:

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- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

46.2+112.3

step-by-step explanation: