URGENT: I need to know the answer to this equation and the step by steps: 4 - (-6)
There are a couple more if you want to do them, because I need help with these too:

-10.3 - (-7.79)
-4 + 6 1/2
-10.2 + 4.38
8 5/6 + (-2 1/4)
Thank you.

What is the equation of the following graph in vertex form? parabolic function going down from the left through the point zero comma twelve and through the point two comma zero and turning at the point four comma negative four and going up through the point six comma zero and continuing towards infinity courtesy of texas instruments a: y = (x − 4)2 − 4 b: y = (x + 4)2 − 4 c: y = (x + 2)2 + 6 d: y = (x + 2)2 + 12

6.(q^9)^2 a. 2q^18 b. q^18 c. q^81 d.q^11 7.(6q^6)^-4 a. 6q^1296 b. 1296q^2 c. 1/1296q^24 d. 6q^-24 8. what is the value of 12x^-3 y^-1 for x = -1 and y = 5? a. -12/5 b.-10 c.-0 d.5/12

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year