Which expression is equal to (3x +1)(4x – 1)?
12x2 - x – 1
12x2 + x – 1
12x2 + 7x - 1
12x2 - 1

Step-by-step explanation:

(3x + 1) ( 4x - 1)

Expand

3x ( 4x - 1) +1( 4x - 1)

12x² - 3x + 4x - 1

12x² + x - 1

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just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

b) k’(6, 4); l’(3, 3)

step-by-step explanation:

a 270° clockwise rotation maps every point (x, y) to (y, -x). (it negates the x-coordinate and then switches it and the y-coordinate.)

this means the endpoints of the side congruent to kl, k' and l', would be mapped as:

k'(-4, 6)→(6, 4)

l'(-3, 3)→(3, 3)