From what i read, you're asking for the "rise over run". in this case, you would rise up three, yet go to the left two due to it's negative trait.
For the answer to the question above,
2r^2 + 3s^3 - r^2 + 4t^2 - r^2
r = -2
s = -3
t = 5
First, we should substitute everything into the expression
(2)((-2)^2) + (3)((-3)^3) - (-2^2) + (4)(5^2) - (-2^2)
Now we should simplify the exponents
(2)(4) + (3)(-27) - (4) + (4)(25) - (4)
Now we simplify the brackets
8 + (-81) - 4 + 100 - 4
so 8 minus 81 minus 4 plus 100 minus 4 is equal to +19
I hope this helps.
Number 20 is 18 and 21 is 26 area is addition perimeter is multiplication
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