So, we know that a^2 + b^2 = c^2. Right? That is called the Pythagorean Theorem.
In this case. We can say that 39 is a, 40 is b, and x is c.
NOTE: It doesn't really matter whether 39 is a or b. a & b are just the two legs of the right triangle.
So, if we say that 39 is a, 40 is b, and x is c. We can plug it into the Pythagorean Theorem.
39^2 + 40^2 = x^2
I'll let you take it from there.
Answer:
For example the age of the Earth (see above) can be written as 4.6 X 109 years. This means that this number has 9 places after the decimal place - filled with zeros unless a number comes after the decimal when writing scientific notation. So 4.6 X 109 years represents 4600000000 years.
Answer is 2 cause it’s 2 :)
We have
First we are taking first equation, and we are solving it
2a=8 /:2 divide both sides by 2
a=4
Now we can backsubstitute a=4
a+b=2
4+b=2 /-4 (subtract 4 both sides)
4+-4+b=2-4
b=-2
The final answer is
Answer:
28.27
Step-by-step explanation: