What is the area of this triangle in the coordinate plane?

6 units²

Step-by-step explanation:

The formula for the area of triangle is 0.5bh where b is the length of the base and h is the (perpendicular) height.

A=0.5bh

A=0.5(4)(3)

A=6

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -