Question

Can I get help plz? it's about simplifying expressions by combining like terms​

Answer 1

19. 16x-4 ; 20. 10y+1

Explanation:

19. The perimeter of a rectangle is expressed as P= 2(side1) + 2(side2)

If side1= x-3 and side2= 7x+1

P=2(x-3) + 2(7x+1)

=(2x-6) + (14x+2)

P=16x-4

or

P=4(4x-1)

20. The perimeter of a triangle is expressed by adding all three sides together.

If side1=3y+5 side2=y-4 side3=6y

P=(3y+5)+(y-4)+(6y)

P=10y+1