Answer:
[-1;∞)
Step-by-step explanation:
The lowest number is always written on the left side in the interval notation. the interval notation uses parentheses for exclusive sets and brackets for inclusive sets. Let's say you have two numbers m & n and m<x<n, then to write in interval notation, you would write (m,n). If m ≥x ≥ n then, [n,m].
Answer:
y - 8.3 = 6.5(x + 3.4)
{the point-slope form of the equation}
y = 6.5x + 30.4 {the slope-intercept form of the equation}
65x - 10y = - 304 {the standard form of the equation}
Step-by-step explanation:
The point-slope form of equation is: y - y₀ = m(x - x₀), where (x₀, y₀) is any point the line passes through and m is the slope.
m = 6.5
(-3.4, 8.3) ⇒ x₀ = -3.4, y₀ = 8.3
The point-slope form of the equation:
y - 8.3 = 6.5(x + 3.4)
So:
y - 8.3 = 6.5x + 22.1 {add 8.3 to both sides}
y = 6.5x + 30.4 ← the slope-intercept form of the equation
y - 6.5x = 30.4 {multiply both sides by (-10)}
65x - 10y = - 304 ← the standard form of the equation
Well it depends on how you write it 0.36 is lower and so is .36 and any numbers added will make the number smaller like 0.364
Answer:
42
Step-by-step explanation:
Since the scale factor is 2:7, you can divide the given number by 2 then multiply it by 7, so 12/2x7=42
We want to know when we brought it back in to the room. at that time
the temperature difference is 80 - 42 = 38 so we have to solve
<span>
38=9<span>e<span>^−.3344t</span></span></span> for t
this time we get
<span><span>38 / 9</span>=<span>e^<span>−.3344t</span></span></span>
<span>t=<span><span>ln(<span>38 / 9</span>)</span><span> / −.3344</span></span></span>
<span>t=−4.3</span>
so 4.3 minutes before 2:10