Answer:
1/4 would be mystery i think because 3/4 of them are fiction and 1/3 of them are mystery fiction.
The correct answer is 48%. 15 + 16 = 31, and 15/31 = 0.48, so your answer is 48%. Hope this helps!
I'll pick variables and set up a system. In this case, I'll use "p" for "the plane's speedometer reading (apparent speed)" and "w" for "the windspeed". When the plane is going "with" the wind (when it has a "tailwind"), the two speeds will add together; when the plane is going "against" the wind (when it has a "headwind"), the windspeed will be subtracted from the plane's speedometer reading (that is, from the engines' actual output).
<span>In each case, the "distance" equation will be "(the combined speed) times (the time at that speed) equals (the total distance travelled)": </span>
<span>with the wind: (p + w)(2.33) = 1340 </span>
<span>against the wind: (p – w)(2.833) = 1340 </span>
<span>Rather than multiply through, I notice that, if I divide off the 2.33 and the 2.833, I'll have a system that's already set for solving by addition </span>
<span>p + w = 575.1 </span>
<span>p – w = 472.99 </span>
<span>Then, by adding down, 2p = 1048 so p = 524, and w must then be 51.1 </span>
<span>wind speed is 51.1 mph</span>
Answer:
y-intercept = 9
slope = 0
Step-by-step explanation:
y = 9 is a horizontal line that passes through the point (0, 9).
The y-intercept is 9.
The slope is 0.
Answer:
3) y = 3x
Step-by-step explanation:
a line equation is typically written as
y = ax + b
a is the slope, the inclination of the line. it is defined as ratio of "y coordinate change / x coordinate change" when going from one point to another on the line.
so, e.g. going from (0,0) to (4,12) means
x changes by +4 (from 0 to 4)
y changes by +12 (from 0 to 12)
so, the slope is +12/+4 = 3
and the line equation starts like this
y = 3x + b
now, b is the y-intercept : the y value, where the line intercepts (crosses) the y-axis. in other words, the y value where x = 0.
and we have that right away, as the line goes through (0,0). that IS the y-intercept point. the y value there is 0.
therefore, b=0.
and so the full line equation is
y = 3x