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Choose the correct simplification of (5x + 7y)(4x - 6y). (4 points)

20x2 + 2xy + 42y2

20x2 - 2xy - 42y2

20x2 - 2xy + 42y2

20x2 + 2xy - 42y2

second equation :

( 20x² — 2xy — 42y² )

Step-by-step explanation:

expand the two brackets.

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3