<span>What is the value of x in the proportion x + 1 / x+3 = 15/ 21
a.4
b.1/3
c.1/4
d.3</span>
the answer is
a.) 4
X/X+5=-2
please mark brainiest if this helped you out<span />
9!/(8!*(9-8)!)=9
or just use a calculator and use the nCr function
Answer:

Step-by-step explanation:
Given
to 1 d p
Required
The error interval
The error interval is represented as:

Where


So, we have:






Hence, the error interval:
is:

Answer:
26x+6
Step-by-step explanation:
because i am really smart