Answer:
about 28.27
Step-by-step explanation:
A=4πr2
Answer:
It would be (-2,11)
Step-by-step explanation:
I used desmos for this, since it says graphing.
desmos.com/calculator/glijhd4ksg
look at the link to view the graph and solution.
Normally, you would plot points from one line, connect them, then do the same for the other line.
Hope this helps!
Answer:
Here x² + z² ≤ 49 which describes the set of all points whose distance from the y-axis is at most 7 .Thus, the inequality represents the region consisting of all points on or inside a circular cylinder of radius 7 with axis the Y-axis
Step-by-step explanation:
The equation given is equivalent to . This square root, by the pythagorean theorem, represents the distance of a point (x,y,z) to the y axis( that is, to the point (0,y,0) ). There are no constraints in y, so for a fixed value of y, these points lie inside the plane of height y and inside the circle of radius 7 centered at (0,y,0). Taking y as a variable, we join all of these circles alongside the y- axis and obtain a cylinder of radius 7.
Let X be that number.
35 x X 14
--------- =
100
X = 14 x 100
--------------
35
X = 40.
Hope this helps!
Answer:
y=21-3x and y=18-2x
Step-by-step explanation:
Ok, so we have candle A, which is 21 inches and burns 3 inches every hour. in slope-intercept form, the hours would be the x, the 21 is our y intercept. So the first equatio would be y=-3x+21 (negative slope, because the height of the candle is going down). Candle b, which is 18 inches, burns away 2 inches each hour. We can make -2 the slope (negative 2, since the candle is being burned away, not being added to), and the 18 our y intercept. So the two equations would be
y=21-3x
and
y=18-2x
hope this helps!