Answer:
Has your teacher given you notes to practice?
Step-by-step explanation:
If no, then break the question down into pieces and write down what you know.
Answer:
B. -10
Step-by-step explanation:

The first one has got a result different from -12 or -10
4 is a number That u use to count with or something g sorry gotta be more spiscific
Answer:
Step-by-step explanation:
1.
19² = 17² +x²
19² - 17² = x²
√361-289 =x
√72 = 8.5 ≈ x
Area = base*h/2 = 17*8.5/2 ≈ 72.3
Perimeter = 19+17+8.5= 44.5
and so on...
2.
x²= 5² +13²...
A= 5*13/2 =...
P= 5+13+x=...
3.
20² = 10² +x²...
A=10*x/2=...
P=20+10+x=...
4.
x² = 5² +14²...
A=5*14/2 =...
P= 5+14+x = ...
Answer:
The answer is in the picture.
Step-by-step explanation:

Also x cannot equal to 0 if you plug in into the original equation the answer is indefinite/not solution.