1. Suppose that BC is hypotenuse, then by Pythagorean theorem:
.
2. If BC is not hypotenuse, then BC is a leg and AC is hypotenuse (because AC>AB). Hence by Pythagorean theorem:
.
Step-by-step explanation:
Using that fact that,
and
We need to find sin which that formua is
We know what r and x is so we need to find y.
Sin is positve on the interval pi/2 to pi. so we get
b.
so
c.
d.
e.
Answer:
Number of protons
Step-by-step explanation:
The atomic number represents the number of protons that are in the nucleus. This says what chemical properties something has and where it is located on the periodic table.
Best of Luck!
Answer:
A. ( x + 2)²=9
Step-by-step explanation:
2x2 + 8x = 10 equivalent to :
x²+4x =5 ....(divid by2)
(x²+4x+4 ) - 4=5
(x +2)² - 4 = 5
(x +2)² =9...(add 4)