<span>(2a + 2) / (a^2 – 1)
(2(a +1)) / (a^2 - 1)
(2(a + 1)) / (a^2 - 1^2)
(2(a + 1)) / ((a + 1)(a - 1))
2 / a - 1
The answer is: 2/a - 1.</span>
Answer:
Straight-line equations, or "linear" equations, graph as straight lines, and have simple variable expressions with no exponents on them. If you see an equation with only x and y – as opposed to, say x2 or sqrt(y) – then you're dealing with a straight-line equation.
There are different types of "standard" formats for straight lines; the particular "standard" format your book refers to may differ from that used in some other books. (There is, ironically, no standard definition of "standard form".)
Answer:
Step-by-step explanation:
Consider the equation
Substitute
into the equation:
This is quadratic equation, where
Hence,
Now, use the substitution again:
1. When then
2. When then
This equation has no solutions, because the range of is and 3>1.
Answer:
Step-by-step explanation:
<u>Volume formula:</u>
<u>Given:</u>
<u>Find the volume:</u>
- V = 3.14*(4.5/2)²*(3*4.5) = 214.6 cm³ (rounded)
Answer:
50
Step-by-step explanation: