Ja tontti
jack said, “five times my age in 2 years is 100."
how old is jack now?

19 years, 7 months, and six days old

Step-by-step explanation:

100-2=98/5=19.6

18 years old

Step-by-step explanation:

Break it down: 5×(age in 2 yrs)=100

Rewrite with a variable: 5×(x+2)=100

Multiply it out: 5x + 10 = 100

Isolate the x term: 5x = 90

Isolate the x: x = 18

d 192

step-by-step explanation:

we find our area to find area we multiply thoses numbers to get our answer so our area is 192

- 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