Explain why - 4 is not a real number but 3^-8 is

Prove the identity. tan (x - y) + tan (z - x) + tan (y - z) = tan (x - y) tan (z - x) tan (y - z)

Solve for L: A = L ⋅ W ⋅ H A. L = A times W/H B. L = W times H / A C. L = A / quantity W times H D. L = W / quantity H times A

Using the distributive property write a numerical expression that is equivalent to 25+10

Dritown received 0.135 inches of rain in the spring of 2011. Write this decimal as a fraction in simplest form. A: 7/50 B: 1/8 C: 13/100 D: 27/200

Ingrid has $30 to buy oil paints for her painting class. Each tube of paint costs $9. How many tubes can she buy? Do not include units in your answer.

He school has 800 students with 20 students on the gymnastic team and 10 students on the chess team (including 3 students who are on both teams). How many students in the school are not members of either the gymnastic team or the chess team?

What method can you use to find the product of 70*55

Recursive rule for an arithmetic sequence is a1=-3; an=an-1+7. What is the iterative rule for this sequence?

Estimate a 15% tip on a $23.77 dinner bill. I'm a little confused on how to figure this out

Solve the system by graphing or using a table y=x-2 y=-2x+7