The answer is 300 because 2 times 15 is 30 than you just add the zero
You just have to plug in the -3
(-3)^(2)+8(-3)-7
Then the answer would be -22
S^2 + s^2 = 9^2 => 2s^2 = 81 => s^2 = 81/2 => side length s = 9(sqrt(2))/2 = 6.37 cm.
The answer is 4.7. The formula to find the area of a triangle is A=1/2bh
So you would do 2 times 1/2 which is 1. Then 1 times 4.7 is 4.7. So the answer is 4.7. Hope this helped!