8C3=8*7*6/3*2*1=8*7=56
5C2=5*4/2*1=10
Answer:
It'll have an open circle on both 7 and 21, with a line connecting.
Which is none of the options, unless one isn't shown?
Step-by-step explanation:
-23 > -4x + 5 > -79
So:
-23 > -4x + 5
-23 - 5 > -4x
-4x < -28
x > -28 / -4
x > 7
-4x + 5 > -79
-4x > - 79 - 5
-4x > -84
x < -84 / -4
x < 21
Should be 270 minutes because 1500 is 250 6 times so you do 45 minutes 6 times which ends up as 270
The first step would be to add 40 to both sides of the equation, you can use multiple methods to solve from there, but I recommend 'completing the square' since your b value is equal to zero :)
If we draw a perpendicular line from one of the vertices of the triangle we get 2 right angled triangles each with altitude 9 ins and vertex angle = 30 degrees. So:-
cos 30 = 9 /h where h = one of the sides of the equilateral triangle
h = 9 / cos 30 = 10.392 inches
Therefore the perimeter of the triangle = 3 * 10.392 = 31.1769 ins
Answer is 31.18 inches to the nearest hundredth.